PRIMARY PLANT NUTRIENTS (a multivitamin)

N   Nitrogen	P   Phosphorous	K   Potassium
strong stem	healthy root growth	overall health
foliage growth	flower production	disease resistance
	seed production
Deficiency: General yellowing of older leaves (bottom of plant). The rest of the plant is often light green.	Deficiency: Leaf tips look burnt, followed by older leaves turning a dark green or reddish-purple.	Deficiency: Older leaves may wilt, look scorched. Interveinal chlorosis begins at the base, scorching inward from leaf margins.

What the numbers mean.
A fertilizer label which reads “18 -24 - 6”

18% of the content is Nitrogen
24% is Phosphorous
6% is Potassium
52% is inert (or inactive) material