This was my first shot at starting tomatoes from seed, after an afternoon of viewing various "how tos" on YouTube. Building the Grow box cost less than $20.

What medium did you plant them in? Soil-less mix? No problem with damping-off disease? I've had problems with that in the past.

Not my cup of tea. I'd get attached and be afraid to put them in the ground.

I used Jiffy Seed Starting Mix. Before planting the seeds I wet the mix just enough so it would stay together in a clump when squeezed in the hand. After that, I sprayed the top surface with a spray bottle whenever the top surface of the mix dried out - about every other day, giving each plant three trigger pulls of the spray bottle. Once the plants formed their first true leaves I used a very weak mix of Miracle Grow in the mist about every third or fourth watering. No problems so far.


https://www.homedepot.com/p/Jiffy-12-Qt-Organic-Seed-Starting-Mix-G312/204405556

I've had so many problems with seedlings damping off now I just wait and direct sow the seeds into the ground. I usually get about 50% survival and I'm happy with that. Walmart has some generic seed packs for .20 each,I couldn't pass those up! Slugs and snails are my biggest enemy now.