Checking your petunias more than once a week is okay, but not necessary.

Be sure to remove the entire head of the flower and not just the petals. [3] X Research source Removing deadheads prevents the plants from going to seed, which would prevent them from blooming.

Do not remove any remaining leaves on the stem.

This is an effective way to remove deadheads if you have too many plants to pinch off individual deadheads one at a time.

A 10-10-10 solution contains 3 main nutrients- nitrogen, phosphorus, and potassium. Do not apply too much fertilizer, as it can be harmful to your plants in large doses. Use fertilizer no more than once a week.