Q.Tomato seedlings
What causes leaves to curl or fall off of tomato plants started from seed and about 7 weeks old?
Downtoearthdigs
Answered on May 6, 2016
This could be watering issues; too much or too little.
Lighting issues or even a fungus called dampening off.
Here are some links that will help.
https://www.gardeningknowhow.com/edible/vegetables/tomato/growing-tomatoes-from-seed.htm
https://www.gardeningknowhow.com/garden-how-to/seeds/what-is-damping-off.htm
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