Light and Heat Exposure & Seedlings (When to Start)
In the past, I've noted that light exposure to seedlings is not necessary until true leaves are present (may take 3-4 weeks for this to occur) as only true leaves acutally photosynthesize light to plant energy. Others have suggested exposing seedlings to light as soon as they emerge following germination. Is there any benefits to exposing seedlings to lights before true leaves form?
Also I know that certain veggies (i.e. peppers) benefit from warm soil for increased root development. Would all my veggies (tomatoes, cucumbers, eggplants, peppers, herbs) benefit from seedling growth on top of a warm mat. In the past, I've only used the mat for germination purposes and then removed it from the process.