Not every perennial needs to be covered. You only need to protect marginally hardy plants (rated for warmer zones than your current location), new first-year plantings, and tender, frost-sensitive varieties.
Perennial Flowers: Most perennial plants do not suffer frost damage and do not need to be covered. Frost sensitive perennials include Hostas and Bleeding Hearts.
The basics of putting the perennial garden to bed:
Some perennials, like hostas, peonies and daylilies, need to be pruned in fall to avoid winter damage. Plants like these should be pruned after the first few frosts in late fall or early winter. Other perennials like mums and coneflowers are better off being pruned in spring just before new growth comes in.
In gardening, the "3-year rule" describes the natural growth cycle of perennial plants, often summarized as: "Year one they sleep, year two they creep, year three they leap". It helps set realistic expectations for landscape establishment.
Hotter summers, extended droughts, and dry winds are becoming more common, and hydrangeas are paying the price. Gardeners from coast to coast report the same issues: leaves crisping and curling in early summer, stems wilting despite regular watering, and blossoms fading far too quickly.
While there is no single "longest blooming" flower, a few top-tier perennial champions consistently produce flowers for 4 to 6 months—spanning from late spring all the way to the first fall frost.
Do not cut back evergreen perennials (which need their foliage for winter crown protection), spring-blooming perennials/shrubs (which have already set next year's buds), or plants with seed heads and hollow stems (which feed birds and shelter beneficial insects during the winter).
Soft Fruit Bushes
Raspberry, blackberry, and gooseberry bushes can all be trimmed or pruned in November, so long as they are summer-fruiting varieties. Start by removing any dead, damaged, or weak wood, then thin out older stems to make way for vigorous new shoots.
🍂 Here are ten plants that you needn't cut back in the Fall: 1. Rhododendrons and Azaleas - these flower on old wood, so wait until late Spring, no more than three weeks after they're finished blooming. 2. Lilacs - same as above, pruning late will remove the plant's flower buds and reduce blooms.
Plants to Prune in October
When you don't have proper frost cloth, the best alternatives are breathable household fabrics like old bed sheets, lightweight blankets, drop cloths, or burlap. These materials trap heat radiating from the soil without crushing the foliage. Always drape them loosely and secure the edges to the ground.
At the end of the season, let herbaceous plants naturally die back after the first frost before cleaning up. Cut the dead foliage down to about 111 to 222 inches from the soil to deter pests, but leave hardy varieties with seed heads or stiff stems uncut to provide winter interest and wildlife food.
Most established perennials do not need to be covered, as they are adapted to cold weather. However, you should cover them if they are young, newly planted, actively budding/blooming, or if you are expecting a hard freeze (below 28°F).
Prepare perennials for winter by clearing away diseased foliage, watering thoroughly before the first deep freeze, and applying a 2 to 4-inch layer of mulch after the ground freezes to prevent frost heaving. Wait to cut back certain plants—like ornamental grasses and lavender—until spring to provide winter wildlife shelter and frost protection.
Avoid pruning plants that bloom on "old wood" (buds set the previous year), bleed heavy sap, or need winter cold protection. Pruning these in winter risks losing next year’s flowers or stressing the plant.
7 Plants to Cut Back in November Before It's Too Late, According to Gardening Pros
If you are a bit late, then doing it in September is OK. However, October is too late; new growth won't harden off before the first frosts. Never prune English lavender in winter.
The "3-hour gardening rule" is a safety guideline advising gardeners to avoid working outdoors between 11 a.m. and 2 p.m. during the summer months. This window is when the sun’s UV rays are at their strongest and temperatures peak, posing risks for both you and your plants.
The "3-year rule" for perennials is a popular gardening adage used to describe how plants mature: the first year they sleep, the second year they creep, and the third year they leap.
Certain perennials can bloom continuously for up to 444 to 666 months. The absolute longest-blooming perennials—often flowering from late spring or early summer straight through to the first autumn frost—are 'Walker’s Low' Catmint, 'Rozanne' Cranesbill (Hardy Geranium), and 'Moonbeam' Coreopsis (Tickseed).
No, you should not cut back all perennials in the fall. Leaving certain plants standing provides natural insulation for the roots and essential food or habitat for overwintering birds and pollinators. However, cutting back others is beneficial for tidiness and disease prevention.
Flowers that bloom continuously throughout the year are the Anthurium, known as one of the longest-lasting flowers. Peace Lilies produce elegant white flowers year-round with proper care and thrive even in low-light conditions. Other reliable 365 day plants include Adenium or desert rose, Hibiscus, and Bougainvillaea.
If you are looking for long-blooming perennials, try these:
The classic plant that universally says "I love you" is the Red Rose. However, if you are looking for long-lasting houseplants or specific symbolic meanings in the Victorian language of flowers, there are several wonderful alternatives to express your deepest affections.