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Perennial planting, care and maintenance

Set perennial plants in their permanent places so their roots are completely covered with prepared soil, but avoid burying the stem or crown. Place container-grown plants the same depth that they were grown; place dormant plants at the depth at which they grew the previous season. To encourage side root growth, make a planting hole twice as wide as deep. With bare-root perennials, spread the roots outward as well as downward. For container-grown plants, loosen encircled roots and shake some of the potting soil into the planting hole. Remember to crumble away the top edges of a peat pot to prevent water loss through wicking. Do not let roots dry out, especially during transplanting.

Water the plants thoroughly to force out any air pockets and to settle the soil. Mark and label the plantings. Mulch the bed surface with pine straw or bark to keep soil from drying, crusting, and overheating in the summer, and to prevent many weed seeds from germinating.

Care and Maintenance

If you do not mulch your plants, use shallow cultivation in the spring and early summer to break and aerate compacted soils. This also aids in water penetration and makes it easier to incorporate fertilizer. Summer cultivation can damage shallow roots and is more difficult because the plants will be larger. Early in the season, stake tall plants with wire stands or bamboo canes. Use care to avoid root damage.

Apply fertilizers sparingly to plants early in their growing season, after new growth begins to show. If plants are growing well, no additional fertilizer may be needed; otherwise, a second light feeding will be helpful several weeks into the season.

In the fall, cut the old plant stalks to the ground after the leaves have fallen and mulch to protect crowns and roots from the harsh extremes of our mild weather followed by sudden cold spells. Remove any winter annual weeds that may have germinated before applying mulch. Fall is also a good time to divide many plants that may be encroaching on one another.

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A clump of plants has trimmed tops and exposed roots.
Filed Under: Flower Gardens April 19, 2021

Many of Mississippi’s perennial landscape plants will start to decline after several years. That means they will have smaller foliage and won’t flower as much, even though they’ve been well cared for with regular fertilizer and irrigation.

Tiny pink blooms emerge along a green spike.
Filed Under: Flower Gardens April 12, 2021

It’s no secret that I’m a real fan of salvia. A couple of weeks ago, I enjoyed highlighting sage, which is a great culinary salvia. This week I’m going talk about perennial salvia, another group of these great plants.

A single, green cucumber hangs on a vine.
Filed Under: Flower Gardens, Vegetable Gardens April 5, 2021

If you read this Southern Gardening column frequently, you realize that I grow much more than pretty flowers in my home garden. Besides ornamental plants, I love to grow vegetables that my wife and I can enjoy for dinner.

Four images of sage are pictured in a grid.
Filed Under: Flower Gardens March 29, 2021

Salvia is one of the groups of plants that everyone should have in their landscape. This plant group has flowers with a wide-ranging color palette and different sizes. Salvias are loved -- by me especially -- because of their ability to attract pollinators, butterflies and hummingbirds.

A field of orange and yellow marigolds.
Filed Under: Lawn and Garden, Flower Gardens, Plant Diseases, Trees, Vegetable Gardens March 29, 2021

If you’re anything like me, I find any excuse to get outside. The warmer temperatures and colorful blooms are refreshing, especially after the cold winter we had! Working on outdoor chores is a great excuse to get some fresh air. Here are a few tasks you need to cross off your checklist during April:

Watch

Shady Shrubs
Southern Gardening

Shady Shrubs

Sunday, April 18, 2021 - 5:00am
Tomato Transplants
Southern Gardening

Tomato Transplants

Sunday, April 11, 2021 - 5:00am
Container Gardening
Southern Gardening

Container Gardening

Sunday, April 4, 2021 - 5:00am
Salvia
Southern Gardening

Salvia

Sunday, March 28, 2021 - 5:00am
Geraniums
Southern Gardening

Geraniums

Sunday, March 21, 2021 - 5:00am

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Portrait of Dr. Gary R. Bachman
Extension/Research Professor
Ornamental Horticulture Host of Southern Gardening