Life cycle – The series of stages an insect passes through, from egg to death. Since most eggs are immune to most pest controls, you usually must treat an infested plant at least two to three times at 7 to 10-day intervals to catch newly hatched pests.

Leggy – Said of a plant that’s tall, does not branch as it should, and often has almost all of its leaves clustered at the top. Usually caused by too little light or by lack of pinching or pruning growth back at the proper stages.

Leaching – Flushing out any salt or chemical buildup that may have accumulated in your plants.

Larvae – Newly hatched insects, often worm like in character.

Indirect light – Sunshine that’s filtered or reflected. Almost all inddor house plants prefer indirect light; full sun can burn their leaves.

Hydroculture – The technique of growing plants in water rather than soil. Sometimes called hydroponics. Also called “Soilfree”. For more hydroponics resources, visit Hydroponics Online.

Hybrid – A cross between two or more plants of different heritages, which usually produces a more vigorous plant. Many houseplants are hybrids.

Grow-lights – Special fluorescent tubes or incandescent bulbs that emit the light rays plants need for healthy growth. Regular wide spectrum fluorescents also may be used.

Genus – A broad class of plants that have similar but not identical characteristics. A plant’s Latin name always gives its genus first. Also see species.