Petunias are a remarkably resilient and prolific annual flower that usually fills containers or sunny growing areas with abundant blossoms throughout the growing season. Unfortunately, if you ignore your petunias or neglect to water them, they may suffer ill effects. Bring your dried-out petunias back to life by pruning them and then giving them abundant water. Eventually, you can further revive them with fertilizer.
Prune back the dying petunias drastically. Use the pruning shears to remove at least 1/2 and as much as 2/3 of the length of every petunia stem. Discard the stems.
Water the petunias every day to begin rehydrating them.
Mix fertilizer with water according to package recommendations for your planting area. Apply the fertilizer to the soil around the petunias after you have been watering the petunias for five to seven days. Always water the petunias first, wait approximately one hour and then apply the fertilizer. This will lessen the chances of burning the roots or foliage with fertilizer.
Continue watering the petunias every day. Watch the petunias over the next week after you fertilize. You should start to see the plant recover and begin to grow again. Within a month, your recovering petunia should be bushier and may even have buds on it again.
Resume a regular fertilization schedule (once or twice per month).