What Garden Experts Say You Should Be Pruning Now

Grab your pruners—early summer is the time to snip and clip all kinds of plants.

White Lilac

White Lilac

A striking heirloom lilac, ‘Madame Lemoine’ was bred near Nancy, France, by the famous lilac breeder Lemoine. He named this beauty after his wife. Strongly fragrant double white blooms grace this lilac in late spring to early summer. Flower buds are cream and open to pure white. This French hybrid lilac grows 8 to 15 feet tall and up to 15 feet wide. Hardy in Zones 3-7.

Photo by: BaileyNurseries.com

BaileyNurseries.com

Pruning is the one activity that’s an equal opportunity terror for gardeners. Many otherwise successful greenthumbs experience pruning paralysis. The stakes are high—one wrong cut and you fear wiping out next year’s flowers. While this can happen, it’s really not that dire. Timing is everything. Master that, and you can tackle pruning with ease. Take the fear out of pruning by reviewing what you should be pruning in early summer.

Spring Blooming Shrubs

Prune shrubs that flower before mid-June after they flower. For these spring-blooming beauties, remove the largest stems, cutting them back to the ground. This causes the plant to push out new growth from both the crown and all remaining stems. Prune any other stems to shorten or shape the shrub. Use hand pruners or loppers for this job, not hedge shears.

Shrubs to prune in early summer: lilac, forsythia, Japanese kerria, weigela, deutzia, mockorange, St. John's wort, viburnums and the colorful redtwig and yellowtwig dogwoods.

One exception to this rule is ninebark (Physocarpus). You can cut every stem on this gem back to the ground each spring if what you want is the coppery new growth. This pruning method helps to control plant height and size. Or, if you want to savor ninebark’s pretty white blooms, wait and use the same pruning method after it flowers.

‘Herbstonne’ Rudbeckia

‘Herbstonne’ Rudbeckia

The sunny petals of ‘Herbstonne’ rudbeckia hold their own in the summer garden. ‘Herbstonne’ translates as ‘Autumn Sun,’ hinting at the yellow ray petals that emanate from the green centers like rays of sunshine. ‘Herbstonne’ grows a towering 4 to 7 feet tall—perfect for back-of-the-border plantings. Plants grow 2 to 3 feet wide. Hardy in Zones 5-9.

Photo by: BaileyNurseries.com

BaileyNurseries.com

Tall Summer Perennials

Keep the height of tall summer-flowering perennials in scale with other plantings by removing up to one-third of stem height by mid- to late June. Cutting back these plants does delay flowering, so keep that in mind. It also causes plants to branch and become bushier, which means you’ll have more flowers in the end.

Perennials to prune in early summer: joe-pye weed (Eutrochium), tall coneflower (Rudbeckia ‘Herbstonne’), bee balm (Monarda), catmint (Nepeta), yarrow (Achillea), balloon flower (Platycodon), Culver’s root (Veronicastrum), Veronica and garden phlox (Phlox paniculata).

‘Purple Dome’ New England Aster

‘Purple Dome’ New England Aster

Welcome fall with the beautiful blooms of an autumn classic: New England aster. This beauty offers blooms in a host of hues, including brilliant purple, pale lavender, pink and ruby. Asters beckon butterflies and bees with their blooms, providing an important food supply to pollinators from late summer into fall. Asters have a tendency to flop. Plan to prune in early summer or stake in autumn. ‘Purple Dome’ plants grow 18 to 24 inches tall and 12 to 18 inches wide. Hardy in Zones 3-8.

Photo by: PerennialResource.com

PerennialResource.com

Fall Color

With fall flowering perennials, early summer pruning helps reduce plant height at flowering, which can prevent flopping and the need for staking. Wrap up this pruning by July 4 in regions with October frost dates (sooner in colder zones).

Fall perennials to prune in early summer: asters, Russian sage, garden mums, helenium, turtlehead (Chelone), boltonia, tall sedums and monkshood (Aconitum).

Tomatoes On The Vine

Tomatoes On The Vine

Get the season-long production of an indeterminate tomato in a determinate tomato package with ‘Tidy Rose’ tomato. This plant grows well in containers or small patio gardens. ‘Tidy Rose’ is a beefsteak type tomato that produces fruits weighing 5 to 7 ounces.

Photo by: Ball Horticultural Company

Ball Horticultural Company

Edibles & Herbs

Don’t overlook your edible crops while you have pruners in hand. Cut back chive plants after flowering—you can cut these back to stubs and the plant will resprout. Keep an eye on basil. It shouldn’t set flowers this early, but sometimes it tries. Pinch off flower shoots as soon as you see them. Snip back thyme stems after bloom, cutting to just below the lowest flower. Timing on this herb may slide into July. With cilantro, plants start to bolt (flower) as warm weather arrives. You can harvest cilantro seed (the seed of the cilantro plant is called coriander), or let a few plants self-sow and drop seed. You’ll be rewarded with a semi-perennial patch of cilantro. On established tomato plants, remove all leaves and shoots below the first flower cluster. This helps with disease control later in summer.

Edibles to prune in early summer: Chives, cilantro, basil, thyme, tomato.

Keep Reading

Next Up

Summer Pruning

Pruning isn't just for the dormant season; you can prune during the growing season too.

What To Prune In Late Fall

To prune or not to prune? Get answers to your late-year pruning questions.

Pruners Beware

Horticulture agent Paul McKenzie advises against reckless pruning.

Summer Gardening Planner

Follow this handy checklist and caring for your garden will be easier, quicker and more satisfying.

Summer Garden Trends

Top trends this season across the country include compact berry bushes, fermented foods, tropical plants and more.

A Gardener's Guilt

Spring was good, but then this gardener got the midsummer lazies.

Add Zest to Your Late Summer Garden

Learn how to revitalize your garden in the dog days of summer with these expert tips.

Late Winter and Early Spring Pruning Guide

Get ready for late winter and early spring pruning chores.

Pruning Roses During Winter

See why you should prune your roses when it's chilly outside.

How and When to Prune Hollies

Hollies easily tolerate pruning but not necessarily in deep winter.

On TV

Follow Us Everywhere

Join the party! Don't miss HGTV in your favorite social media feeds.