Winter Care for Perennial Plants: How to Protect Your Landscape Through the Cold Months

Winter has officially arrived in Middle Tennessee, and while your garden may look quiet, your perennial plants are very much alive beneath the soil. Proper winter care is essential to protect roots, prevent winter damage, and ensure healthy regrowth in spring. At Standing Stone Nursery, we often hear homeowners ask: Do I need to cover my perennials? Is it too late to plant? What should I be doing right now? Let’s break it down.

Why Winter Protection Matters for Perennials

Perennials are hardy plants that return year after year, but winter weather can still take a toll — especially during freeze-thaw cycles. Sudden temperature swings can cause soil to expand and contract, pushing plant roots toward the surface where they’re vulnerable to cold damage.

Protecting your perennials during winter helps:

• Insulate roots from extreme cold

• Prevent frost heaving

• Retain soil moisture

• Reduce plant stress going into spring

How to Protect and Insulate Perennial Roots

Mulch Is Your Best Friend

One of the most effective ways to protect perennial roots is mulching.

Recommended mulch depth:

Apply 2–4 inches of mulch around the base of perennials, keeping it a few inches away from the crown of the plant to prevent rot.

Best mulch options for winter:

• Shredded hardwood mulch

• Pine straw

• Leaf mulch (chopped leaves work great)

• Straw (not hay — it contains seeds)

Mulch acts like a blanket, keeping soil temperatures consistent and protecting roots from harsh freezes.

When Should You Cover Perennials?

Timing matters. Covering too early can trap heat and moisture, encouraging disease.

Best time to mulch and cover:

• After the first hard frost

• When plants have gone dormant

• Once nighttime temperatures are consistently cold

For especially sensitive perennials, newly planted plants, or young root systems, you can add extra protection during extreme cold snaps.

Should You Cut Back Perennials in Winter?

This depends on the plant.

You should cut back:

• Plants prone to disease (like peonies or phlox)

• Plants that die back completely

You can leave standing:

• Ornamental grasses

• Coneflowers and black-eyed Susans (great for winter interest and birds)

• Plants that benefit from crown protection

Leaving some plants standing can help trap snow and protect roots naturally.

Is It Okay to Plant Perennials in Winter?

Surprisingly — yes, it can be, with the right approach.

In Tennessee, planting perennials in late fall or early winter is often safe as long as the ground isn’t frozen. Roots can establish even when top growth slows.

Tips for Planting Perennials in Winter:

• Water thoroughly after planting

• Mulch immediately after planting

• Choose hardy, cold-tolerant varieties

• Avoid planting right before a hard freeze

• Focus on root health, not top growth

If you have to plant now, think of it as giving the plant a head start for spring.

What Homeowners Should Do Right Now

If winter is already here, here’s your winter checklist:

• ✅ Mulch all perennial beds

• ✅ Water deeply before the ground freezes

• ✅ Protect newly planted perennials with extra mulch

• ✅ Avoid heavy pruning until spring (unless needed)

• ✅ Check drainage — standing water can be more damaging than cold

Trust Local Knowledge This Winter 🌱

At Standing Stone Nursery, we’re proud to be a local and knowledgeable resource for homeowners and contractors alike. Winter care can vary depending on plant type, soil conditions, and exposure — and we’re always happy to help you choose the right mulch, plants, and materials for your landscape.

Stop by the nursery or give us a call if you’re unsure how to protect your perennials this season.