Waffle beds are the opposite of the raised beds that have become a fixture in US gardens since the 60’s. Unfortunately, raised beds don’t work well in my micro-climate: mid-summer droughts make it difficult to get moisture to the plant roots, and our soil is light and sandy and doesn’t compact well in a heap. For years I’ve noticed that plants (mostly weeds) grow better in the depressions between beds but it wasn’t until this April that I began to take advantage of this. This is the first waffle bed I made almost two months ago, now full of well-grown celtuce and brassicas with a mixed cover crop around the edges.
The depression seems to have kept the seedlings sheltered from the cold winds and night frosts during our late spring. The waffles definitely increase water retention. Below are the first beds I dug near the house for our tomatoes and you can clearly see the color contrast between the dry walls and damp lower level.
The same seedlings, one week later and about twice the size. They evidently like the additional shelter and moisture, while the cover crop of Phacelia Tanacetifolia is drought-tolerant and sprouts well on the waffle “walls”. (I’ve planted 10 beds of at least 5 plants each – to the tune of 700 lbs of tomatoes as a conservative estimate of yield. Come September I may be posting extensively on tomato sauce production.)
This bed in the lower garden has been divided into five waffles: peach tree, cabbages, Provider bush green beans (still under row cover), BlueGold potatoes, and the far bed of celtuce and brassicas pictured above. Everything seems to be thriving. I’ve planted the poor soil heaped between waffles with nasturtiums and a low-growing cover crop mix, mostly to help hold the soil in place during the first year.
I’m pleased with this method so far! Next post will be on this weekend’s project: swales as a solution for “depression” gardening on a south facing slope. Here is a terrific introduction on swale gardening from Tenth Acre Farm.