OUR FAVORITE WAY TO GROW SEEDLINGS

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by Greg and Pat Williams

Peat pots, plastic flats, foam cups we've tried most of the traditional systems for starting seedlings. But last year we experimented with soil blocks, and now you won't find us using any other method! The blocks are easy to make and very inexpensive, and they work wonderfully. There are several mail-order sources for the little machines that produce these cubes; a four-blocks-at-a-time model costs under $20 and should last a lifetime. And we've had excellent results using commercial potting soil with our block maker instead of the costly mixes that are "specially formulated" for soil blocks.

We have run into one problem, though: Top watering causes erosion damage to the blocks, no matter what medium we use. You can get around this by using misters, but then you have to water quite frequently.

We think bottom watering is the way to go. Put absorbent cloth under the soil blocks and stick one end of the cloth into a container of water. The material will act as a wick, absorbing moisture and bringing it to the bottom of the blocks.

Our particular arrangement (which, admittedly, is difficult to move) consists of two-inch soil blocks on an old cookie sheet. One end of a thin cloth diaper runs under the blocks, while the other end rests in a waterfilled bread pan that sits just below the cookie sheet. No doubt you could easily make a more attractive and portable unit from scrap wood and plastic cookware. The important point is that a diaper—or similar absorbent cloth—works just as well as the expensive capillary matting sold by horticultural supply houses.

When using cloths for bottom watering, make sure they're wet before you add the soil blocks. And don't let the water containers go dry! You'll probably need to add liquid only once every few days-no more daily watering or hourly misting!

RESEARCH BRIEFS

No-trench asparagus? Are there better ways to transplant asparagus crowns than the tried-and-true, but truly laborious, deeptrench method? Connecticut investigators have tried planting one-year-old crowns of Mary Washington asparagus in the usual trenches . . . directly on the soil surface and covered with 3"-high mounds . . . and just below the top of 8"-high raised beds. After the first growing season, the crowns in the beds and those in the mounds had a significantly better survival rate than the ones in trenches . . . and more spears per crown, to boot! Time will tell how long-term yields compare among the three methods.

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