Care for a drooping petunia by watering the plant regularly, keeping the soil cool, fertilizing the plant, pruning the flowers and watching for pest infestations. You need fertilizer, water, mulch, insecticidal soap and pruning scissors.Continue Reading
When your petunia plant starts to droop, check the moisture level of the soil. Water the plant once the top of the soil feels dry, giving it 1 inch of water per week.
Add a 2-inch layer of mulch to the plant to keep the soil moist and cool. Move the plant to a shady area during midday sun to keep the plant from becoming overheated.
Fertilize the plant halfway through the growing season to promote growth and help it perk up. Sprinkle a water-soluble 5-10-5 fertilizer over the soil, and add water.
Cut back any overgrown stems to encourage the plant to grow bushy rather than long. It also keeps the plant healthy. Once the flowers die, snip them off down to the nearest leaves.
Keep an eye out for pests that feed on and weaken the plant. If necessary, treat the plant with insecticidal soap to keep aphids away.