A COLDFRAME IS WARM, UNLESS IT’S…
A Fourth Dimension for the Garden
A “coldframe” is one of a few ways to add a new dimension — time — to gardening. Especially, for me, vegetable gardening. It inserts time where time does not exist. Instead of my gardening season screeching to a stop with a hard freeze sometime in late November or early December, a coldframe extends it a few weeks, possibly even more. And it can do the same thing at the beginning of the season, getting plants going and harvested sooner. (Multidimensional vegetable gardening is covered more thoroughly in my book Weedless Gardening.)
At its most primitive, a coldframe is nothing more than a clear plastic or glass topped box set directly on the ground, functioning in the garden as a miniature greenhouse. My simplest coldframe was made from four pieces of scrap pine boards notched together into a three-foot by six-foot rectangle. The covering was quarter-inch plexiglass whose previous incarnation was that of a floor runner beneath office chairs.
My most elaborate coldframe was a purchased structure, looking much like a miniature barn with a double-wall, polycarbonate plastic roof that folded open or closed along tracks in the eaves. Read more









Those winning berries were the handiwork of amateur breeders and some rather esoteric horticulture. Suckling a promising berry, for example, whereby a saucer of water was perched beneath an individual berry throughout its growth, just high enough to wet only its calyx (far end).


I could of course be careful to avoid leaf spotting by not spilling any water, especially cold water, on the leaves. Watering from below would do the trick, with periodic leaching from above to prevent buildup of salts. They also like high humidity.






