I'm curious about the cost of these specialized appliances versus the rewards. I grow tomatoes in my self-built greenhouse, but I found that the best results I got after 3 years was from seeds that fell to the ground and sprouted on their own. The seeds I put into pots produced smaller plants that grew slower than the ones that came naturally. I have to admit that I'm relatively new to greenhouse growing and have made a lot of mistakes the past 2 years and only this 3rd year am seeing success from the plants that grew wild.

I only have room for about 9 plants, so if I spend a lot of money on equipment, would I recoup my investment from my crop? Or are these devices mainly for growing things like bean sprouts that are eaten as sprouts?

Thanks for any advice you can give.