Zinnias are as easy as described here. In addition to seeds in the ground, I usually do a few pots but admittedly the pots get a little too crowded by the middle of September and it puts a strain on the flowers, but even so, several months of nice, potted zinnias are worth having to toss them when they get too root bound. I've taken to not spacing them out after germnation in the ground, but instead I just plant the seeds far enough apart and skip that step. Because zinnias are almost always a sure thing, no worries about bare spots from seeds that didn't germinate - they will. Many varieties will form more petals the longer they remain on the stem, getting larger and more showy. You can cut for vases at any time and yes, the more you cut, the more you get. I keep a bed just for cutting flowers, predominantly zinnias, which hang around long into the fall and cheer up any room in the house.
Zinnias are as easy as described here. In addition to seeds in the ground, I usually do a few pots but admittedly the pots get a little too crowded by the middle of September and it puts a strain on the flowers, but even so, several months of nice, potted zinnias are worth having to toss them when they get too root bound. I've taken to not spacing them out after germnation in the ground, but instead I just plant the seeds far enough apart and skip that step. Because zinnias are almost always a sure thing, no worries about bare spots from seeds that didn't germinate - they will. Many varieties will form more petals the longer they remain on the stem, getting larger and more showy. You can cut for vases at any time and yes, the more you cut, the more you get. I keep a bed just for cutting flowers, predominantly zinnias, which hang around long into the fall and cheer up any room in the house.