Epsom salt on plants make them lush and healthier. Find out yourself, see these 13 Epsom salt uses in garden.
trying to teach B about this.
Greenhouse in a box....
tall, leggy tomatoe starts are no problem, they'll simple start off with an awesome root system! plant them deeply, or even on their side but staked vertically above ground, and tomato stems with firm roots all the way up to ground level.
How To Prune Your Tomato Plants For the Best Crop Yield Gardening Tutorial DIY Instructions