Plant Structure
Leaves
Bracts
Stems
Roots
Insects
Shipping Related Problems
Problems at the Consumer Level
Leaf Edges Yellow and Necrotic
Yellow and Necrotic Leaf Spots
Uniform Yellowing
Leaf Discoloration, Chlorosis
Black Fuzzy Spots on Leaves
Leaf Deformation
Puckering of Leaves
Drooping Leaves
Leaf Loss
Lower leaves partially to completely yellow, combined with low light levels and/or tight plant spacing (
Spacing
)
Electrical conductivity (
EC
) levels too high (combined with dry substrate)
Substrate (root medium) too dry (
Irrigation
)
Lower-older leaves: margins with yellowing or burn (
Boron
toxicity)
Medium to older leaves: necrotic leaf margins, along with interveinal chlorosis (advanced
Magnesium
deficiency)
Medium to older leaves: yellowing and necrotic margins (
Manganese
toxicity)
Medium to older leaves: chlorosis of interveinal areas, progressing to necrosis of the leaf margins (
Potassium
deficiency)
Medium to older leaves: yellow followed by necrosis, plants growing slow and top foliage dark green (
Phosphorus
deficiency)
Upper mature leaves: yellow, upward rolling and scorching (
Molybdenum
deficiency)
High rates and frequency of
insecticides
Light brown to tan lesion on leaves, developing gray fuzzy mold under humid conditions (
Botrytis
)
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