The tomato plants have been in the ground for a couple of weeks. I think this is the earliest ever.
The cardboard keeps the ground more moist, prevent weeds, and prevents splashing fungal and bacterial disease spores onto tomato leaves. I have wire cages in place for taller growing varieties. All of the drip irrigation emitters are in place and working. This year, I used in-line rater than individual emitters, 0.5 gal every 6 inches. That way I don't have to take them apart at end of season, less plastic waste. I don't know if they will keep the soil more uniformly moist, but I think so.
After the photo, I laid steel fence posts on the cardboard to prevent wind from scattering them.
After season's end, I compost the cardboard.
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