Wait to trim parsley sprigs from the plant if you planted the parsley from seeds. Seeded parsley will be ready to harvest about three months after the seeds germinate.
Trim parsley off from the tips of the stems when you need only a sprig or two. This can provide the most tender parsley, ideal for garnishing plates before serving.
Snip stalks of parsley immediately above the soil level with the pruning shears to provide a substantial amount of parsley for cooking. This method of parsley harvest is also suitable for times when you wish to harvest parsley for drying.
Cut off all stems from just above the soil level at the end of the growing season. Because parsley is an annual herb, it will not return again the following spring. Use the parsley fresh, freeze it or dry it for extended storage.