Hi. Give them the right amount of light, air circulation and don't over-water. That's it.
Hi I agree on both the other answers. .I also feed mine. .I use Miracle grow plant food. . Merry Christmas .
Lack of green means lack of sunlight. Place them in a well lighted window or use grow lights. This should really help.
When I put my plants on a schedule they grew! I only water Monday's and the water portion is minimal...less is more! Plus miracle grow once a month..again small portion!
THE WORLD-WIDE KNOWN MARTHA STEWART says -- you eat food every day, don't you .... well... YOUR PLANTS NEED FOOD TOO!!! Get good plant food and give THEM a BANQUET!!!! --- always follow directions to the letter! -- food, water, light -- plants will THRIVE!