Damping-off can be prevented or diminished by sprinkling milled sphagnum moss, which contains a natural fungicide, on top of the soil. I have been pleased overall with this company's merchandise. Our health gets a boost, too. I bought the flats with holes. But the ridges on the bottom are not well spaced for Landmark 3 inch pots which tip easily. I recently got really discouraged after watching all my seeds pop up into beautiful little buddies, then one day they all tipped over and withered up.. I've been using ones just like them to start my seeds.
Way better than anything local, nice and sturdy and even with paying shipping, still cheaper than purchasing locally. These trays are perfect for just about any seeding use. Durable enough that I could drill holes where I needed to so that the water can flow from tray to tray. I am using the trays to grow fodder. I use these to carry my seedling trays, also purchased here.
I will buy these again. Put a light inside the enclosure. I recommend this company and its products to amateur gardeners like myself. This was exactly what I expected. These trays are sturdier that the ones you get in the garden center.
These work great for seed starting and I can usually get several years use from each--providing I don't pull off and on shelf too much--OR step on them. Perfect size for the inserts as well as the peat pots that I used for transplanting. Very happy with purchase! Bringing garden soil inside may also bring you unwanted pests and fungal diseases. Definitely gonna string one up!