Direct sunlight may increase the temperature in your terrarium and create an environment that is unstable for your plants. 

Grow lights or indirect light near a window are best.

As your plants grow, they will draw up the water from the soil. You may notice the soil is a lighter color, or the leaves are wilting.

Add small amounts of distilled or fresh rain water just until soil is moist again.

Condensation is a sign of too much moisture or too much heat. 

Remove the lid for a few hours to a day to allow excess moisture to escape.