BLACKCAPS AND PRUNING
Blackcaps All Season (Almost)
It’s a bumper year for blackcaps (also know as black raspberries or, botanically, Rubus occidentalis), at least here on the farmden. Up to last year, we harvested wild blackcaps from plants that pop up at the edges of woods. The current bountiful harvest is from blackcaps that I planted a couple of years ago. Last year’s harvest was unimpressive because the plants were still settling into their new home.
Most blackcaps, like many other bramble fruits, have biennial canes that grow stems and leaves their first year, fruit in early summer of their second year, then die back to the ground. (Annual harvests are possible because while those second year canes are fruiting and then dying, the perennial roots are pushing up new canes, which will bear the following year.)
Niwot and Ohio’s Treasure, the two varieties I planted, stand out from the crowd in bearing on new, growing canes as well as on two-year-old canes. Their two-year-old canes, like those of run-of-the-mill blackcaps, bear now, in early summer. Berries are borne on new, growing canes towards the end of the growing season, until stopped by cold. The next season’s summer crop is borne lower down on those same canes. The upshot of all this is that I get to eat fresh blackcaps in early summer and then again in late summer.
I knew I could expect two crops each season from these varieties when I planted them. That’s why I planted them. What I didn’t know is how abundant and flavorful the berries would be. Unfortunately, for the purposes of evaluation, the two varieties are growing in separate locations that differ markedly from each other. The one in the better location — a humus-rich soil basking in abundant sunlight — yields oodles of large berries. The other variety — planted in a weedy bed shaded from the east by a greenhouse wall — yields less and smaller berries, with perhaps a tad better flavor.
Pruning Niwot and Ohio’s Treasure is as important for ease of picking and pest control as it is for other brambles. And it’s easy.
Right after the current crop grinds to a halt, I’ll cut every cane that bore fruit right to the ground. These two-year-old canes are going to be starting to die anyway. I could cut them down in winter, but cutting them sooner gets the thorny canes out of the way of late summer harvest.
All summer long, I’ll also pinch out the growing tip of any new canes when they reach about four feet in height. Pinching induces side shoots, on which fruits are borne.
That’s it for summer pruning. Sometime next winter I’ll reduce each clump of canes to the six healthiest and shorten each side shoot on remaining canes to about 18 inches long.
All in all, Niwot and Ohio’s Treasure yield a lot of delicious fruit over a long period of time for minimal effort. Now, if only the canes were thornless.
And More Pruning
Whoa, I can’t yet put away the pruning shears. I need the shears for some rose bushes. With the rose “crop” subsided, pruning will get varieties that bear only in June ready for next season, and those that bear again and again through summer to bear again and again.
For roses that bear only once each season, such as the heavenly scented Rose D’Ipsahan, or the cheery, lemon-colored blossoming Father Hugo’s Rose, I cut back some very old stems right to or near ground level, and shorten the remaining stems, some by a quarter of their length, others by three quarters of their length. Then I go over the bush to thin out any crowded stems. This pruning makes room for and stimulates growth of new shoots with ample time for them to initiate flower buds this summer that will unfold next spring.
Repeat blooming roses get pruned differently. The goal is to cut off stems with spent flowers and coax new growth that will flower this season. Instructions for pruning hybrid tea roses are very specific; and I quote: “. . . . cut the stem back to a five-leaflet leaf. Retain at least two five-leaflet leaves on each shoot.”
I don’t grow hybrid teas, which generally are finicky roses, preferring tougher roses such as some of the David Austin varieties, such as L. D. Braithewaite
and Charlotte. Pruning is very simple. I just lop stems or groups of stems laden with spent blossoms as far back as I feel like to keep the shrubs from growing too large. They both get another pruning in late winter.
Another rose I grow, rugosa rose, won’t get any pruning this summer. Besides its nonstop, fragrant flowers, rugosa rose also bears nice hips, that is, fruits. The hips make excellent jam and are rich in vitamin C. Pruning in summer would remove spent flowers which then couldn’t go on to swell into fat hips.
Will those Braithwaite roses grow in 4B? I want to grow large rose bushes so badly, and I do have the Rugosa, but some smaller Watercolor roses are not doing well over the winters despite my efforts to protect and cover them.
Thank you, Diane
I’m not sure how they would do in 4B.But they’ve done very well here in the colder part of Zone 5 for a number of years without any sort of protection whatsoever. And the location where they are planted is not at all sheltered.
I would like to start a new bed of black raspberries. The bed is 30′ long x 6′ wide. It’s in a sunny location with the long side facing south. We are in southern Ontario, zone 5, but we get a fair amount of wind (although the orchard is somewhat sheltered) so I always try to plant hardier than our zone. I can get both Niwot and Ohio’s Treasure locally bare-root. I am trying to decide which one to choose. Any advice?
I’ve fruited them for only a year so don’t have a clear favorite. So far, they don’t seem that different. They’re both good.
I would highly recommend Bristol Black raspberries from Fedco in Maine. I have them in my NY state zone 4b garden and in their 3rd year they are going strong. large, lucious berries that handle the snow and wind!
I grew up in southern New York and picked buckets of black caps as I grew up. I now live in northern Virginia and would love to plant some black-caps in my yard. Do you know where I can purchase the canes? We used to make the best tasting jam from them and I loved picking them.
They’re available from lots of nurseries.For instance, http://www.ediblelandscaping.com, starkbros.com, and onegreenworld.com. (All three are reputable nurseries.)
My mother made lots of jams and jellies from the wild blackcaps,or black raspberries as some call them, and she always added a handful or so of cranberries to the pot. These jams were so good I hid about 2 jars for myself every year.Try adding some cranberries and I guarantee you’ll be pleasantly surprised.
I’m not a fan of cranberries. I don’t consider them edible, although I would eat them if I was really hungry. 🙂
I decided on the Ohio Treasure, and ordered 10 plants. Niwot’s description said very vigorous and needs trellising, so I thought maybe I could get away without trellising the Ohio Treasure. We shall see!