what causes red veins in the leaves of geraniums?

Question

We have several geranium plants that have yellow leaves and red veins in them. What causes this and how can we treat it???

Answer 1

It is likely due to a nutrient imbalance, though watering with cold water, cooler air temperatures and keeping the soil too wet could also be causes. A soil test wold confirm any deficiencies so they can be corrected.