Several plants should never be deadheaded if you want them to thrive in your garden. These include self-seeders that need to drop seeds to return next year. Self-cleaning varieties handle cleanup on their own without your help. Wildlife plants grown to feed birds need their seeds intact. And single-bloom perennials flower just once so deadheading won't help them at all.
I learned this lesson the hard way with my hollyhocks a few years back. I tidied up every spent bloom that first summer feeling proud of my neat garden beds. But the next spring? No hollyhocks came back at all. These biennials rely on dropping seeds to return and I had stopped that cold. I lost years of established plants.
Self-cleaning plants are a modern gardening gift that saves you real work. Breeders developed these varieties to drop their petals and abort seed growth on their own. You don't need to touch them at all. Wave petunias Diamond Frost euphorbia and New Guinea impatiens all clean up after themselves. They look tidy without any effort from you.
Penn State Extension lists specific self-seeding plants you should skip when deadheading. Hollyhock foxglove cardinal flower and forget-me-not all need their seeds to keep coming back year after year. Without seeds these plants vanish from your garden within a year or two. You'll wonder what happened when spring comes.
Plants that don't need deadheading also include varieties grown for their seedheads. Ornamental grasses sedum and alliums look great with their dried flower heads standing through winter. Removing them takes away half the show these plants put on for you during the cold months.
You should also leave seedheads on any plants you're growing for wildlife in your yard. Coneflowers black-eyed Susans and sunflowers feed goldfinches through fall and winter months. I set aside a corner of my garden just for bird food plants where I never deadhead anything. The birds thank me every fall.
Single-bloom perennials like peonies iris and daylilies only flower once per season no matter what you do. Deadheading won't give you more flowers since the plant is done blooming for the year. You can tidy up the spent blooms for looks but don't expect any new buds to form from your efforts.
Check your plant tags before you buy anything new from the garden center. Look for words like self-cleaning or no deadheading needed on the label. This saves you work and stops you from hurting plants that need their seedheads left alone to reproduce.
When you're not sure about a plant look up whether it's annual biennial or perennial first. Research if it self-seeds or needs deadheading for more blooms. A few minutes of reading can save you from losing plants you wanted to keep in your garden beds for years to come.
Read the full article: Deadheading Flowers for Continuous Blooms
