Fall Planting Mistakes: 5 Things Every Gardener Should Avoid

There's something deeply satisfying about getting your hands in the soil as the air turns crisp. Fall is one of the kindest seasons for planting—the ground is still warm, rainfall tends to be more consistent, and your new additions get a head start on root development before the busy growth of spring arrives. But that gentle window of opportunity can close quickly if a few common mistakes creep in.

We've spent generations nurturing plants at our Georgia nursery, and we've seen firsthand how small missteps in autumn can set a garden back months. The good news? These mistakes are easy to avoid once you know what to watch for. Below, we'll walk through the five most common fall planting mistakes, along with a few plant picks from our collection that thrive beautifully when planted this time of year.

Mistake #1: Planting too deep (or too shallow)

One of the most frequent errors we see is planting at the wrong depth. Dig a hole too deep, and roots can suffocate or rot in trapped moisture. Plant too shallow, and roots are exposed to temperature swings and may dry out.

The general rule: the top of the root ball should sit level with, or very slightly above, the surrounding soil line. For shrubs like Buxus 'Winter Gem' boxwood, this is especially important, since boxwoods are sensitive to soil that's packed too tightly around their root flare.

Mistake #2: Getting watering wrong

Fall's milder temperatures can be deceiving. Many gardeners assume cooler weather means less watering is needed, b

ut newly planted roots still require consistent moisture to establish themselves. On the flip side, overwatering in cooler soil that drains more slowly can lead to root rot.

This balance matters most for moisture-sensitive varieties. Hydrangeas, for example, want soil that stays evenly moist but never soggy, making fall pla

nting a great opportunity to establish healthy roots before the demands of summer blooming.

Mistake #3: Skipping mulch

Mulch does more than tidy up a garden bed. It regulates soil temperature, locks in moisture, and protects roots from the freeze-thaw cycles that can heave young plants right out of the ground over winter.

A 2–3 inch layer of mulch, pulled back slightly from the stem or trunk, is enough to insulate roots without inviting rot. This step is particularly valuable for evergreen shrubs like Thuja Green Giant, which benefit from steady soil temperatures while their root systems expand underground through the cooler months.

Mistake #4: Crowding plants too closely

It's tempting to plant generously when a bed looks sparse in fall, especially since many plants appear smaller before they've filled out. But overcrowding limits airflow, increases disease risk, and forces plants to compete for nutrients and water.

Always plant according to the mature spread of the variety, not its current size. Ornamental grasses like Calamagrostis 'Karl Foerster' need breathing room to develop their signature upright form, and shrubs such as Azalea 'Formosa' fill out significantly once established, so give them the space they'll need a year or two down the road.

Mistake #5: Choosing the wrong plants for fall

Not every plant is suited for a fall start. Tender annuals and heat-loving tropicals often struggle once temperatures drop, since they don't have time to root before frost arrives. Fall planting works best with hardy perennials, shrubs, and trees that benefit from a head start on root development.

Some reliable fall performers include:

• Camellias, which often bloom in fall and winter, bringing color when little else is flowering

• Boxwoods, prized for their structure and ability to establish well in cooler soil

• Hollies, valued for year-round interest and resilience through winter

• Azaleas, which reward fall planting with a stronger bloom the following spring

Choosing varieties suited to your USDA hardiness zone makes an even bigger difference. If you're unsure what grows best where you live, it's worth checking your zone before making final selections.

Give your garden the fall start it deserves

Fall planting rewards patience. The work you put in now, checking planting depth, watering mindfully, mulching generously, spacing thoughtfully, and choosing the right plants for the season, pays off in a garden that wakes up next spring already ahead of schedule.

If you're ready to start planting, take a look at our fall favorites for shrubs and perennials bred to settle in beautifully during the cooler months. Your future garden will thank you for it.