Pinching, pruning or cutting
No matter how you slice it, I gave the zinnias a big cut back, about half of the plant. They all have multiple new shoots forming on the main stems. It will be interesting to see how long the new stems are and what the buds look like. This will also be the first new growth under the higher power LED lights. The 4 plants to the right of the photo just came out of growing under the LED shop lights. The two flowering ones in the back are a breeding test run to see if I can pollinate the flowers for seed production. Fingers crossed!