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The condition of a sick plant with yellowing leaves due to inadequate formation of chlorophyll. Chlorosis is caused by a nutrient deficiency, usually iron or nitrogen; nutrient deficiencies are themselves often caused by a ph that is out of the acceptable range.
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A plant produced through asexual reproduction including, but not limited to, cuttings, layering and tissue culture.
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Misting plants with fertilizer solution, which is absorbed by the foliage.
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A hydroponic system in which the medium, usually aggregate pebbles, is periodically flooded with nutrient solution and then drained again, feeding and aerating the medium and root system.
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A very efficient watering system that employs a main hose with small water emitters. Water is metered out of the emitters, one drop at a time.
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A hydroponic method wherein air pressure from a small air pump is used to percolate nutrient solution out through a ring of feeder tubing which encircles the plant.
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The amount of dissolved solids, usually fertilizer salts, that are measured in water in parts per million.
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Disease that attacks young seedlings and cuttings, causing stems to rot at the base; overwatering is the main cause of damping-off.
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This micronutrient is an internal catalyst and acts as an electron carrier; it is also believed to play a role in nitrogen fixation.
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To soak new Rockwool in an acidic solution to lower the ph from 8.0 to 5.5.
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An acidic solution has a ph below 7.