All my veggies germinated a few weeks ago and since they been growing at a decent rate. My garage temp varies between the mid 50s and mid 60s depending on outdoor temp.

Should my seedlings be under a heating mat still?

Also I've been watering (from underneath) my veggies whenever the soil seems dry. The exception has been that for the tomatoes I've been doing it less frequently because I understand they don't like water that frequently. So when their soil seems dry I wait an extra day or two before watering.

All of my seedlings get 16 hours under the grow light from 4pm to 8am.

I will post some pics tonight to see if I'm where I should be at this point in time.