Umbellifers (Apiaceae) Umbellifers include fennel, celery, root vegetables such as carrots and parsnips, and herbs such as parsley and cilantro. Note that their leaves and umbrella-shaped flowers are very similar. Many umbellifers are cool-season crops, especially carrots, parsnips, and parsley, which prefer spring and fall. However, some (like dill and fennel) can grow in warmer months. Planting and harvesting umbellifers…