Ask the Master Gardener: Plants in containers need regular fertilization to maintain nutrients

Ask the Master Gardener: Plants in containers need regular fertilization to maintain nutrients

Dear Master Gardener: I have lots of geraniums on my deck and many of the leaves have turned red. Is this normal or is there something wrong? Answer: When the leaves of an annual geranium (Pelargonium) turn red it is a sign that the plant is stressed. There are typically three reasons for geranium leaves turning red: over or underwatering, nutrient deficiencies or cool temperatures. We can rule out cool temperatures and with all this rain unde…