A dry pot will also feel lighter when picked up or tilted on its side. The frequent watering required by potted plants leaches nutrients out of the soil, particularly nitrogen. So fertilize often to compensate, at least twice a month. Water soluble or liquid fertilizers are easy to use. Protect plants from pests.
Many insect pests can quickly get out hand on fast growing container plants.
Examine plants often and use Bayer Advanced Garden Insect Control Products when necessary.