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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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News

A clear panel covers a window on the exterior of a house.
Filed Under: Flower Gardens September 14, 2020

I write this while contemplating what a wild year 2020 has been. There’s no need to remind anyone about the pandemic that has literally changed our landscape.

The next big thing is Hurricane Sally making landfall on the Mississippi Gulf Coast this week. Every tropical storm or hurricane creates landscape and garden chores that need to be finished before the storm arrives.

My biggest concern is always for the wind blowing loose objects around and causing damage.

A yellow-and-black-striped caterpillar rests on a stem in a cluster of orange and yellow flowers.
Filed Under: Flower Gardens September 7, 2020

Many of my gardening friends are already on the lookout for the annual migration of Monarch butterflies on their way to their Mexico wintering grounds. Witnessing this migration is awe-inspiring.

Last year towards the end of September, clouds of Monarchs made their way through Mississippi.

Dozens of pink flowers in clusters rise above green foliage.
Filed Under: Flower Gardens August 31, 2020

We’re already into our September garden, and lots of great things are going to happen.

As temperatures finally start to moderate -- my fingers are crossed -- most of our summer flowering annuals that look ragged after surviving the heat and humidity will start to perk up. I think of this as our flowering annuals getting their second wind.

Four house plants in white pots.
Filed Under: Master Gardener, Lawn and Garden, Cut Flowers and Houseplants, Flower Gardens, Landscape Architecture, Turfgrass and Lawn Management, Vegetable Gardens, Weed Control for Lawn and Garden August 28, 2020

And just like that, we’re three-fourths through the year! Cooler temperatures will be here before we know it, hopefully sooner rather than later. Even though we all know the heat will stay around a little longer, it’s time to start preparing for fall and winter.

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