Nitrogen and phosphorus deficiencies
Leaves of plants deficient in nitrogen turn uniformly yellow or reddish orange. Older leaves are affected
first. Petioles may turn reddish. Deficiency of phosphorus causes older leaves to turn dark green. Upper
leaf surfaces develop a shiny, metallic appearance, lower surfaces become purplish, and leaf veins appear
blue.
Solutions
Nutrient deficiencies rarely occur in strawberries as long as recommended cultural practices are followed.
Avoid nutrient deficiencies by providing adequate fertilizer. If you apply fertilizer during the season,
be sure to use only the minimum amounts needed to avoid potentially harmful accumulations of salt. | 
Nitrogen
deficiency
Lower
leaf surface deficient in phosphorus
|
