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There are 84 entries in the glossary.
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Term Definition
pHA scale from 1 to 14 that measures the acid to alkaline balance of a growing medium (or any other substance). In general, plants grow best in a pH range of 6 to 6.8; 6.3 is considered ideal. If the pH is not within the acceptable range, nutrients may not be absorbed to maximum capacity.
 
PHOSPHORUS (P)Phosphorus promotes and stimulates early growth and blooming and root growth. It hastens maturity and seed growth, and contributes to the general hardiness of plants. Phosphorus is a macronutrient.
 
PHOTOPERIODDay length; the relationship between the length of light and dark in a 24 hour period.
 
PHOTOSYNTHESISThe process by which plants use light energy to collect carbon dioxide from the atmosphere and convert it to chemical energy in the form of sugar.
 
PISTOL

The entire female section of the flower, including the eggs, ovary, style, and stigma.

 
POLLENThe mass of microspores in a seed plant that usually appears as a fine dust and is the agent of pollination.
 
POLLINATIONThe transfer of pollen from the male part of a flower (stamen) to the female part of a flower (the style and stigma).
 
POTASSIUM (K)Potassium promotes disease resistance and good development of carbohydrates, starches and sugars, and it increases fruit production. Potassium is a macronutrient.
 
PROPAGATE

Sexual propagation: to produce seed by breeding different male and female flowers.

Asexual propagation: to produce plantlets (also known as CLONES) by taking cuttings.

 
PYRETHRUMNatural insecticide made from the blossoms of various chrysanthemums.
 


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