What Should I Plant in the Fall?

Why fall works here

Soil temperature lags air temperature by weeks. Through October and into November the ground is still warm enough for roots to grow actively, while the top of the plant has slowed down and stopped demanding water to support new leaves.

That combination — warm soil, mild air — is exactly what a new plant wants, and it is a combination spring never offers. A plant set out in April gets about six weeks before a Carolina summer arrives to test it.

What to plant now

Trees and shrubs

The biggest winners. Camellias, blueberries, hydrangeas, quince, roses. Anything woody has months to establish before it is asked to do anything.

Perennials

Daylilies, hosta, liriope, asters. They will die back above ground and put everything into roots, then come up in spring noticeably stronger than a spring-planted division.

Cool-season color

Pansies, violas, snapdragons. These actively prefer the cold — they will flower through mild spells all winter and then surge in early spring.

Herbs

The hardy ones: thyme, rosemary, oregano, winter savory, sage. Basil is a summer plant and will not make it; do not let anyone sell you one in October.

Edibles

Kale, collards, cabbage. Cool weather genuinely improves them — a light frost sweetens collards and kale, which is why they taste better in December than in September.

Bulbs

Daffodils, tulips, alliums go in the ground now to be chilled through winter. There is no other window for them.

Doing it properly

Water thoroughly at planting, and keep watering. This is the step people skip because it feels cool out. A new plant still needs water through November, and a dry autumn is as hard on it as a dry summer.

Mulch, but do not bury. Two to three inches, pulled back off trunks and stems. Mulch piled against a trunk holds moisture on bark that wants to be dry, and that is how you lose a shrub slowly.

Watch the soil, not the calendar. Push a finger in. Cool weather and a rainy week can still leave a root ball dry if the canopy shed the rain.

Choose for the location, not the photograph. The plant that suits your light and your drainage will outperform the prettier one that does not, every time and without exception.

Remember what you are buying. Fall planting is an investment in next year. The reward arrives in June.

How late is too late?

Around here you have until the ground cools in earnest — generally through November for woody plants, and bulbs can go in later still.

The rule of thumb: if you can dig comfortably, you can plant. Just give whatever you put in a deep watering before the first hard freeze, and mulch it.