Parsley is a staple in my greenhouse. I have primarily grown it over the years for my bunnies. It’s a favorite of rabbits. It does well in containers and is extremely easy to grow. Basically all you have to do is water it. Plant the seeds in mid-May after danger of frost is gone. I use a potting soil with fertilizer included. Parsley generally comes back every year. Mine is in my greenhouse so it is protected through the winter. Even then, I have occasionally lost some when the winter has been particularly harsh.
As with most herbs, it does better when you trim it often. Since I use it as part of my rabbit’s diet, trimming has never been a problem for me. It can also be used to cook with dried or fresh.
One of my favorite things about parsley is that it attracts the caterpillars that become Eastern Black Swallowtail butterflies. They show up at the end of summer and eat the parsley down to the stalk. They make their cocoons in my greenhouse and in the spring I have butterflies. I absolutely love that and the butterflies are beautiful. As a bonus, the parsley comes back twice its size after they eat it down.
Below are pictures of the caterpillars and butterflies that I am fortunate to have inhabit my greenhouse every year.