ebb and flow or flood and drain n - hydroponic gardening system that utilizes a pump to draw nutrient solution from a reservoir and flood the growing medium, which drains back into the reservoir, several times a day
EC meter n - acronym for Electrical Conductivity meter; used to measure the EC of a solution to determine the amount of nutrient in a solution
environment n - the totality of the surrounding conditions in the area in which something exists or lives; the combination of external physical conditions that affect and influence the growth, development, and survival of organisms
Epsom salt n - chemical compound (MgSO4) dissolved in water and applied to growing medium or foliage to treat Magnesium or sulfur deficiencies
exhaust n - the foul air let out of a room through a register or pipe provided for the purpose; v - to draw out the contents of
exhaust fan n - a fan that moves air out of an enclosure
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