Zinnia plants are easy to grow and have colorful blooms. But it’s easy to kill them with too much water or not enough fertilizer. The good news is that there are a few tricks you can use to help keep your plants healthy and happy. If you’re looking for something to put in your garden, here are a few ways to keep zinnias blooming. 1.
Water and fertilize your zinnias. Zinnias need plenty of water but they also need nitrogen and phosphorus to grow properly. A zinnia plant has the ability to take nitrogen from the air and convert it into nitrogen-containing fertilizer for the leaves and roots. They also need phosphorus to make flowers and leaves.
Water deeply and frequently (at least twice a day). Pinch off tips or remove damaged leaves when necessary. Cut back on fertilizing if you see plants becoming leggy. When to Harvest You will know when your zinnias are ready for harvest by looking at them. You may also notice that the flower buds are beginning to turn yellow and drop off. The flowers will continue to drop off as they mature.