Pale green leaves with dark green veins; yellowing of foliage.
A lack of normal green pigmentation in foliage, generally due to
deficiency of one or more micronutrients (usually iron), root rot, or root-knot
nematodes; some leaf yellowing on older leaves is normal
Acidify the soil with aluminum sulfate, iron sulfate, or wettable
sulfur. Iron chelate may be used on the soil or foliage. An acidulating
houseplant fertilizer can be used to lower soil pH. Allow the soil to remain
evenly moist but not saturated.