Many plants thrive when trimmed during the cool temperatures of spring or fall. Yet, certain beloved perennials have the capacity to bloom again if you shear them back in the heat of summer, once their initial blossoms have withered. By trimming these 10 perennials this summer, you can prolong their flowering period and savor an extended display of your favorite blooms. Additionally, master some essential pruning techniques to ensure your cuts are precise.
Catmint boasts a lengthy blooming period, typically starting in late spring and continuing into late summer. By removing spent flower stems or cutting the entire plant back by a third once it ceases to flower, you can encourage even more blossoms and achieve a neater, bushier appearance.
Similar to catmint, yarrow has an extended blooming window, but its stems may sag as the season advances. Cutting back these droopy stems to the lower leaf sets after the first flush of flowers can stimulate the plant to produce sturdier new growth. Moreover, this pruning method may诱导 yarrow to bloom again in autumn.
Anise hyssop, usually trimmed in spring, benefits from a light summer pruning to grow bushier and flower more profusely. Trim faded flowers and pinch back stems for a more robust growth, but cease pruning by mid-summer to prevent the plant from being more susceptible to fall cold damage.
Lady’s mantle, which primarily grows in spring, can appear untidy by summer’s end due to its increasingly limp stems. A late-summer cut down to the ground not only neatens the plant but also prompts fresh growth, potentially yielding a few fall blossoms. It’s wise to remove spent blooms before they drop seeds and self-sow if you wish to prevent lady’s mantle from spreading excessively.
Most salvias bloom from summer to autumn and will flower more abundantly if you remove spent blooms regularly. For a more thorough pruning, cut stems back by a third after the first wave of flowers. This tidies the plant and may trigger a reblooming.
Cranesbill geranium is another long-season bloomer, flowering from spring to early fall, with peak bloom in early summer. A hard cutback following the main flowering period encourages more leaves and better late-summer flowering. Trim stems back by a third to half with sharp pruners or shears.
While annual coreopsis typically requires deadheading of spent flowers, its perennial counterpart benefits from more aggressive pruning. Cut the plant’s stems back to a leaf node upon flowering, or shear them down to the ground. Pruning sections weekly can lengthen the bloom and prevent bald spots in your garden.
Delphiniums, with their short flowering season from spring to early summer, might produce additional autumn flowers if you cut back old flower stems after the initial bloom. After pruning, water and fertilize your delphiniums to provide the nutrients necessary for their famous large blooms.
Veronica’s delicate flower spikes can be deadheaded to prompt reblooming, but for flowers into fall, cut the stems down to one of the lower leaf rosettes once the flowers have passed their prime. Fertilizing after pruning can enhance its flowering.
Spotted deadnettle, with its vibrant purple flowers that bloom from late spring to early summer, often flowers less and develops leggy stems in hot summer weather. Pruning back then can stimulate new growth and even some additional flowers.
Proper timing and technique for pruning your perennials can significantly enhance their flowering and extend it by several weeks or months. To maximize the benefits of summer pruning, consider these tips:
Remember to deadhead regularly. Perennials like coneflowers, black-eyed Susans, and daylilies may not need heavy summer pruning but will flower more if you remove spent blooms regularly. Deadheading is also advisable to prevent self-sowing.Sterilize pruning tools. Plant diseases such as powdery mildew spread more easily in summer, so sterilize your pruners and shears, especially after handling diseased or pest-infested plants.Cut above a leaf node. When deadheading or pruning, make your cuts just above a leaf node to encourage new growth, maintain a tidy appearance, and minimize the risk of disease.
