ONE OF THANKSGIVING’S UNSUNG HEROES

Years ago I wrote about one of the unsung heroes of Thanksgiving, the groundnut (Apios americanum). This plant, which helped nourish the Pilgrims through their first winters, never achieved the reknown of corn, pumpkins, cranberries, and other foods of the season.
Groundnut
When I first wrote about groundnuts, I had just planted them. I pointed out that there was renewed interest in the plant, though specifics as to how to grow it were wanting and selection of superior clones was just beginning. Now that I have grown groundnut for a few (thirty plus!) years, I am ready to share my experiences.

It Looks Like . . . And Acts Like . . .

As you might guess from the name, the plant makes edible tubers, usually the size of golfballs and strung together on a thinner, ropelike root. The swollen roots on one of my plants are more the size of tennis balls than golf balls. Not as obvious, below ground, at least, is that the plant is a legume; as such, it can “fix” atmospheric nitrogen, that is, put it in a plant-available form.

The plant also has shown some virtues aboveground. Chocolatey brown flowers dangle like jewelry from the twining stems. The flowers are pretty enough to have accorded groundnut a place in flower gardens in France a hundred years ago. On some plants, the flowers also have a strong and delicious aroma – vanilla, instead of chocolate, though.
Groundnut flower
I started some of my plants from seed; others I purchased growing in pots. I trained each vine up and down and around a tomato cage. The plants were and still are in full sun and rich soil, with a thick mulch of wood chips. The ground is so fluffy that I can harvest by just grabbing one end of a root, then pulling it up and out of the soil.

Soon after I planted groundnut, I discovered that it is weedy. I was soon finding plants, first sneaking across the ground a couple of feet from mother plants, and then further and further.

Aboveground, the twining stems reached around and insinuated themselves amongst the branches of a nearby bush cherries and other plants.
Groundut vine
To further unsettle me, I was startled at the reappearance, with vigor, of one young plant which I thought I had destroyed as I dug looking for edible roots. (I since learned that harvest must be delayed until the second season.) I hope groundnut will not prove to be as unruly and as hard to remove as the horseradish I once foolishly planted in the garden!

Is It Good To Eat?

Now for the important question: What does groundnut taste like? Thomas Hariot, in A briefe and true report of the new found land of Virginia (1590) may have been the first to write of groundnut, and his opinion was “boiled or sodden they are very good meate.” In 1602, a correspondent from New England wrote to Sir Walter Raleigh that groundnuts were “as good as potatoes.”

Dr. E. Lewis Sturtevant (Sturtevant’s Notes on Edible Plants, 1919) reported an eighteenth century horticulturalist writing that the “Swedes ate them for want of bread, and that in 1749 some of the English ate them instead of potatoes.” He also quotes a nineteenth century writer, who wrote that the Pilgrims “were enforced to live on ground nuts.”

Moving up to the twentieth century, wild food forager Euell Gibbons, who enjoyed everything from cattails to milkweed pods, was reserved in his praise of groundnuts.

I have harvested groundnuts and, because they should not be consumed raw, boiled some and baked some. They taste almost as good as potatoes, though less distinctive. The texture was dry and mealy. Like Euell, I am reserved in my praise of the roots, though other groundnut plants might have better or worse roots. (After all, not all potatoes taste the same.)

I do think that groundnut, even in its present primitive state, is a native, perennial, permaculture friendly vegetable (I have been accused by some of being a permaculturalist)  good enough to deserve a place at the Thanksgiving table. That is, it deserves a place in the garden and on the Thanksgiving table as long as it’s planted where its growth and spread can be reined in.

How about calling it one of its Indian names – nu nu, perhaps – and making nu nu stuffing standard Thanksgiving fare? Happy Thanksgiving!

GOURMET COMPOST WORKSHOP/WEBINAR

WEBINAR: GOURMET COMPOST FOR YOUR PLANTS   

Learn the why and the how of making a compost that grows healthy and nutritious plants, everything from designing an enclosure to what to add (and what not to add) to what can go wrong (and how to right it). Don’t bother stuffing old tomato stalks, grass clippings, and leaves into plastic bags; just compost them! The same goes for kitchen waste. Learn what free materials are available for composting.

Smelling compostAlso covered will be the best ways to use your “gourmet compost.” Good compost is fundamental to good gardening; it put the “organic” into organic gardening, making healthy soil and healthy plants. Plus a segue into compost tea.

Whether your interest is to produce a material that’s good for your garden or to recycle kitchen and garden waste, this workshop will teach you all you need to know to make good compost.

Bring your questions.

Date: September 23, 2020 
Time: 7-8:30 pm EST
Cost: $35

Register for this webinar at:
https://us02web.zoom.us/webinar/register/WN_XmctJm_9QLWlKmW4hK1Lhg

After registering, you will receive a confirmation email containing information about joining the webinar.

COMPOSTING WORKSHOP/WEBINAR

COMPOSTING WORKSHOP/WEBINAR

Presentation by Lee Reich (MS, PhD, researcher in soil and plants for the USDA and Cornell University, decades-long composter, and farmdener*):

Learn the why and the how of making a compost that grows healthy and nutritious plants, everything from designing an enclosure to what to add (and what not to add) to what can go wrong (and how to right it). Don’t bother stuffing old tomato stalks, grass clippings, and leaves into plastic bags; just compost them! The same goes for kitchen waste. Learn what free materials are available for composting. “Bring” your questions about this important topic. 
Compost bin
Also covered will be the best ways to use your gourmet compost. Good compost is fundamental to good gardening; it put the “organic” into organic gardening, making healthy soil and healthy plants.

Whether your interest is to produce a material that’s good for your garden or to recycle kitchen and garden waste, this workshop will teach you all you need to know to make good compost.

Space for this workshop/webinar is limited so registration is necessary. Sign up soon to assure yourself a space.

Date: September 23, 2020
Time: 7-8:30 pm EST
Cost: $35

Register for this webinar at:

https://us02web.zoom.us/webinar/register/WN_XmctJm_9QLWlKmW4hK1Lhg

After registering, you will receive a confirmation email containing information about joining the webinar.

*A farmdener is more than a gardener and less than a farmer.

UPCOMING COMPOSTING WEBINAR/WORKSHOP

Presentation by Lee Reich (MS, PhD, researcher in soil and plants for the USDA and Cornell University, decade-long composter, and farmdener*):

Learn the why and the how of making a compost that grows healthy and nutritious plants, everything from designing an enclosure to what to add (and what not to add) to what can go wrong (and how to right it). Don’t bother stuffing old tomato stalks, grass clippings, and leaves into plastic bags; just compost them! The same goes for kitchen waste. Learn what free materials are available for composting. “Bring” your questions about this important topic.

Also covered will be the best ways to use your “gourmet compost.” Good compost is fundamental to good gardening; it put the “organic” into organic gardening, making healthy soil and healthy plants.

Whether your interest is to produce a material that’s good for your garden or to recycle kitchen and garden waste, this workshop will teach you all you need to know to make good compost.

Space for this workshop/webinar is limited so registration is necessary. Sign up soon to assure yourself a space.

Date: September 23, 2020 
Time: 7-8:30 pm EST
Cost: $35

Register for this webinar at:
https://us02web.zoom.us/webinar/register/WN_XmctJm_9QLWlKmW4hK1Lhg

After registering, you will receive a confirmation email containing information about joining the webinar.

*A farmdener is more than a gardener and less than a farmer.

Smelling compost

SICKNESS, MY CORN NOT ME

An Interesting Puzzle Unfolds

Sudoko and Scrabble and other games and puzzles offer endless hours of entertainment and stimulation. Or so I hear.  I get those challenges and rewards from my garden. Case in point is a bed of sweet corn which has been stunted all season long and then last week, almost suddenly, all the plants’ leaves turn sickly as well. Needless to say, ears are developing poorly or not at all. Why, I asked?

I have to backtrack. Each year I plant 4 beds of corn, each about 20 feet long, which supplies plenty of ears for fresh eating and freezing. I spread out the harvest season by planting a new bed every two weeks after the previous planting. Each bed, like other beds in my vegetable gardens, is spread each year with a one-inch depth of compost to maintain fertility (as well as other benefits).
Tall Golden Bantam corn
At first I thought perhaps there was a fertility problem with the stunted bed. But, as I wrote, all the beds get the same fertility treatment. Watering is also the same, via drip irrigation. And early-season Chinese cabbage plants sharing that bed with the corn look fine and healthy.

The suddenly sickly leaves were very telling, with yellow streaks that turned to tan, dead spots. It didn’t take long to nail down the cause to Stewart’s Wilt, also known as bacterial wilt. Two culprits are at work here. The first is a bacterium (Pantoea stewartii), which needs a friend to actually get inside and infect a corn plant. That friend is the corn flea beetle (Chaetocnema pulicaria). The beetles overwinter as adults, with the bacteria in their gut, and emerge in spring to feed on and infect corn plants. Seeds from infected plants can also grow up infected, although this is relatively rare.

Other evidence supports my finger-pointing. The corn flea beetle doesn’t tolerate cold weather well, making the disease more prevalent after milder winters. Check. Last winter was the warmest winter in decades. Stewart’s Wilt is also most prevalent in hot summers and dry summers. Check. Check. One of the most susceptible varieties is Golden Bantam, which I grow. Check.

Disease development

Disease development on leaves

Fertility can play a role, with ammonium nitrogen and high phosphorus levels favoring the disease, and high calcium and potassium decreasing plant susceptibility. Probably not a factor; phosphorus level is high in my beds, as are levels of potassium and calcium. Based on growth in the rest of the garden, there’s no reason to suspect ammonium levels are too high.

Why This Year?

Putting a name to the problem is not the end of my puzzle. 

One remaining question is why the one bed was so severely infected, and not the other three. Golden Bantam is an heirloom variety, with seed saved each year — for the past 100 plus years — from self-pollinated plants. Although basically the same, all Golden Bantam plants are not clones, that is, genetically identical. Slight differences could exist between “lines.” I had more than one source of Golden Bantam seed this year. I always assumed that all the Golden Bantams are sufficiently identical, so I never record which source or sources I planted in each bed. It could be that one bed was planted with seed of a more susceptible line.
Infested bed
Another possibility for the unique performance of the last bed could be that it’s development coincided with the flea beetle’s development such that it was rendered more susceptible. Earlier ripening corn generally is less susceptible than later ripening ones.

I’m tending toward the theory that this growing season presented a unique “perfect storm” of conditions that favored the disease.

Looking Forward

The most important part of solving this puzzle, of course, is: what to do? I don’t particularly like the flavor or texture of modern supersweet hybrids, even if many are wilt resistant. Some popular old varieties — Country Gentleman and Stowell Evergreen, for example — are wilt resistant. But — and not to be a picky eater — those varieties are white corns; I like yellow corns.

More than that, I like Golden Bantam sweet corn. This variety was the most popular variety early in the 20th century. Although the pathogen was identified by, of course, F. C. Stewart in Long Island, New York in 1895, not much could be done to control its devastating effects until resistant hybrids were developed. The first of these was bred from two lines of Golden Bantam, in 1923. It wasn’t long before 70 tp 80% of canned corn was of this variety, Golden Cross Bantam.

Golden Cross Bantam is still available today. The plants are sturdier, more productive, more uniform in ripening than Golden Bantam, and wilt resistant. I’ll plant it next year. (I may have accidentally grown it a few years ago. Given Golden Bantam’s popularity, “Bantam” was included in the names of many hybrids and genetic lines. For more about my experience see my blog post from September 1, 2016.) I hope Golden Cross Bantam, seed of which I already ordered, tastes as good as my original Golden Bantam.

I’ll also plant a few hills, labeled as to seed source, of the real Golden Bantam to see if Stewart’s disease appears and, if so, if severity varies between those sources.

Puzzle complete, till next year.

Golden Bantam, a hit since 1906

Golden Bantam, a hit since 1906

BLUEBERRY GROWING WEBINAR REDUX

•For anyone who missed my recent 90 minute webinar on Growing Blueberries, the webinar has been recorded and is available soon for a limited time period on-demand for $35. The webinar covers everything from plant selection to planting to maintenance to pests to harvest and preservation. Including, of course, the all important getting the soil right and dealing with birds.

•After this webinar, you will be really good at growing blueberries! 

Contact me before 9 am EST August 20, 2020 if you’d like to view the webinar.

FINAL REMINDER FOR BLUEBERRY GROWING WORKSHOP WEBINAR ON AUG. 12, 2020, FROM 7-8:30 PM

Final reminder for my zoom Blueberry Growing Workshop/Webinar on August 12, 2020 from 7-8:30 pm EST. I’ll cover everything from planting right through harvest and preservation. If you’re new to growing blueberries, you’ll learn how to grow this fruit successfully. If you already grow blueberries, you’ll be able to grow them better. If you’re an expert on growing blueberries, you don’t need this workshop/webinar. Registration ($35) at https://us02web.zoom.us/webinar/register/WN_NSTrunuTRkOcRfS-frQuYg. For more information, go to https://leereich.com/workshops.
Bunch of blueberries

BLUEBERRIES AND ASPARAGUS (SEPARATELY)

All Good

I’ve never met a blueberry I didn’t like. Then again, I have yet to taste a rabbiteye blueberry (Vaccinium asheii), native to southeastern U.S. and highly acclaimed there. I also have yet to taste Cascades blueberry (V. deliciosum), native to the Pacific northwest. With “deliciosum” as its species name, how could it not taste great? And those are just two of the many species of blueberry that I’ve never tasted that are found throughout the world.

BLUEBERRY FRUITING BRANCHThe blueberries with which I am most familiar are those that I grow, which are highbush blueberry and lowbush blueberry. I grow blueberries because they are beautiful plants, because they are relatively pest free, because they are delicious, and because they fruit reliably for me year after year. 

I have to admit that highbush blueberries, at least to me, all taste pretty much the same. They have nowhere the broad flavor spectrum of apples. Tasting the same is fine with me; as I wrote, they are delicious. Depending on the variety, the berries do vary in ripening season, size, and other less obvious characteristics. One very important influence on flavor is how they are picked. Blueberries turn blue a few days before they are at their peak flavor, which is okay if you’re marketing them and just want them blue. But the best tasting tasting, dead-ripe ones are those that drop into your hand as you tickle a bunch of berries, which makes a good case for growing them near your back door.

Lowbush blueberries also taste pretty much the same from plant to plant, but their flavor is decidedly different from that of highbush blueberries, a more metallic sweetness. Few varieties of lowbush blueberry exist, so most plants are just random seedlings anyway. Not to disparage that, though; they’re also all delicious — if picked at the right moment.
Lowbush blueberry blooming

A Different Blueberry

My idea that all highbush blueberries taste pretty much the same was recently challenged. New highbush varieties have been bred or selected since this native fruit went, over the past 100 years, from being harvested from mostly from the wild to being mostly cultivated. Over the years I’ve been very pleased with the nine varieties I had been growing, spreading out the harvest season from late June until early September.

Then the new variety, Nocturne, bred by Dr. Mark Ehlenfeldt of the USDA, caught my eye. Besides being billed as having unique flavor, Nocturne was also said to be notable for its jet-black fruits which, before they turn jet black, are vivid red-orange in color. What attracted me wasn’t the fruit’s unique colors, but its allegedly unique flavor atypical, so the description read, of either rabbiteye [which is in Nocturne’s lineage] or highbush.”
Nocturne blueberry
So I called Mark to learn more about the variety. One of the original breeding goals back 25 years ago, when Nocturne’s carefully selected parents were mated, was to get a rabbiteye variety that, blooming later than most, would be less susceptible to spring frosts. Chemically, two significant differences between rabbiteye and highbush blueberries are their organic acids. Rabbiteyes have mostly malic and succinic acids, yielding a flatter taste profile than highbush fruits, whose citric acid makes for a brighter, sharper flavor. Other species were also thrown into the mix, including Constable’s blueberry (V. constablaei), a native of higher elevations in southeastern U.S., and contributing late blooming and excellent flavor.

Long story short: Nocturne is significant for being a variety with significant rabbiteye parentage that is winter hardy to well below zero degrees Fahrenheit and late blooming. It has excellent flavor, juicy sweet, and sprightly, and quite different from my other highbush varieties. Nocturne tastes even juicier than it is. Which do I like better? Neither, I like them all. Nocturne, now in its third year here on the farmden, now has a permanent place in my Blueberry Temple.

Blueberry Temple

Blueberry Temple

Learn the Ins and Outs of Growing Blueberries

If you have the space, grow blueberries. To that end, I will be holding a zoom workshop/webinar on growing blueberries on August 12, 2020 from 7-8:30 pm EST. I’ll cover everything from planting right through harvest and preservation. If you’re new to growing blueberries, you’ll learn how to grow this fruit successfully. If you already grow blueberries, you’ll be able to grow them better. If you’re an expert on growing blueberries, you don’t need this workshop/webinar. Registration ($35) is a must as space is limited; registration link is

https://us02web.zoom.us/webinar/register/WN_NSTrunuTRkOcRfS-frQuYg. For more information, go to https://leereich.com/workshops.

Asparagus Redux

On a totally different topic, I’d like to followup on my end-of-harvest-season treatment of asparagus. Weeds have always been somewhat problematic in my asparagus bed. Harvest ceases at the end of June so plants can grow freely and feed energy to the roots which will fuel the following year’s spears in spring. Weeds quickly move into this hard-to-weed area.

As I wrote on this blog a few weeks ago, this past June, at the end of asparagus harvest season, I mowed everything, weeds as well as emerging asparagus spears, to the ground with my scythe. I then blanketed the ground with a thick mulch. I first laid down an inch depth of compost, which will feed the soil as well as smother roots, and then topped that with another inch or two of wood chips.

There was the danger of smothering the emergence of new asparagus shoots, but plenty have pushed up through the mulch.

As far as weeds, there are very few. Most of them appear at the grassy edge of the bed.

Success!
Mulched asparagus

DRIP WORK

Many Benefits of Drip

I’m a big fan of drip irrigation, an irrigation system by which water is frequently, but slowly, applied to the soil. It’s better for plants because soil moisture is replenished closer to the rate at which they drink it up. With a sprinkler, soil moisture levels vacillate between feast and famine.

Because of the efficient use of water, drip is also better for the environment, typically using 60 percent less water than sprinkling.
Dripline with beans
And drip is better for me — and you, if your garden or farmden is dripped. By pinpointing water to garden plants, large spaces between plants stay dry so there’s less weeds for us to pull. And best of all, with an inexpensive timer at the hose spigot, I turn on the system in April and then pretty much forget about watering until the end of the growing season.

Troubleshooting

Today I was reminded about the “pretty much” part of being able to forget about watering until the end of the season. My drip system is set up so that same main line that quenches plant thirst in my two vegetable gardens continues on to water about twenty potted plants. Or not!
Drip tubes to potted plants
I noticed yesterday that some of the potted plants were dry and assumed that the emitters bringing water to these pots were defective. Turns out that sometimes they dripped and sometimes they didn’t. Hmmm. I kept switching around and replacing the “defective” emitters and by the end of the day, for some reason, they were all working. Problem solved.

No! I have a hose connected near my well pump so that I can occasionally hand water some melons I’ve planted in a truckload of leaves a local landscaper provided me with last autumn. Water pressure was very low. 

Long story short is that the seasonal line from the well to the pump has a short section of flexible, almost clear plastic tubing. Sun shining on the tubing grew a nice crop of algae within. I disconnected the tube and was able to remove an almost intact tube of algae that had been clogging the line. That was the culprit responsible for the capricious behavior of the drip system and the sluggish behavior of the hose for hand watering.

Thorough cleaning and reconnecting the tubing, wrapping it in aluminum foil to exclude light, priming the pump, and cleaning the sediment filter in the drip line had everything working waterly again. Geez, you gotta be a rocket science to keep things working smoothly. Well, not quite.

I’ve now marked my calendar to check the drip system every 3 weeks.

Some Attention Necessary

In addition to checking periodically to make sure that the water flows unobstructed, my watering system — any drip system —  requires other regular attention, including a small amount of hand watering. The reason has to do with the shape of the wetting front drip presents in the soil. As a drip of water enters the ground, gravity pulls water downward at the same time that capillary action is pulling the water horizontally.  Down in the ground, that wetting front is shaped like an ice cream cone, at first widening with depth and then narrowing to a point.

The width of the cone depends on soil porosity. Clay soils have small particles with commensurately small pores (illustration from my book Weedless Gardening).
Wetting front various soil types
Those small pores exert a strong capillary pull so the ice cream cone spreads wide, as much a six feet at its widest down from each point source of water. At the other extreme is a sandy soil, whose large particles have large spaces between them and comparatively little capillary pull; the result is a slender ice cream cone, spreading no more that a couple of feet wide.

A drip system is a series of emitters, so the wetting fronts can merge together at their widest points presenting a wetting front that in soil cross section looks like waves below ground, with peaks at ground level at each emitter. (This illustration is also from Weedless Gardening.)
Wetting fronts, merging
Distance between peaks depends on the spacing of drip emitters. Depth of the wave troughs between the peaks depends on the soil texture and emitter spacing. A soil rich in clay with close emitter spacing would be wet at the peaks, with the “waves” relatively close to the ground surface between the peaks.

Between emitter peaks, the ground is dry near the surface. Plant a seed there and, in the absence of rain, the seed will just sit. Tuck a transplant into the soil there and, in the absence of rain, it will dry out and die. Hand watering gets that seed or transplant’s roots growing; once the roots reach down far enough to tap into the wetting front, they’re on their own.
Watering by hand
To avoid hand watering I sometimes move the drip line right over the row where I planted seeds or right along the row where I set transplants. After a few days or once seeds sprout, I move the drip line back to its rightful position which, along with one other line, is about 9 inches in from each of the outer edges of my 3 foot wide vegetable beds. 

Only one more maintenance item for my drip system. If it has rained cats and dogs, that is, more than 1 inch, as measured in a rain gauge, I might turn off the drip system temporarily. Then — and this is very important — I’ll stick a Post-It note  on which is written “Drip” to my bathroom mirror as a reminder to turn the drip system back on in due time. Drip irrigation is low maintenance, but not no maintenance.