How To Grow Rhubarb In The South

Southern heat demands a different approach to rhubarb, one that respects its need for winter chill. If you have been searching for how to grow rhubarb in the south, you likely already know that this plant usually prefers cold northern climates. But with a few clever tricks and a bit of patience, you can absolutely enjoy those tart, pink stalks from your own backyard.

Most gardeners in USDA zones 8 and warmer struggle with rhubarb because it simply does not get cold enough in winter. The plant needs a period of dormancy to produce well. However, this does not mean it is impossible. You just have to outsmart the heat.

Understanding The Chill Requirement

Rhubarb needs about 500 to 1000 hours of temperatures below 40°F to break dormancy. In the South, those hours are rare. Without this chill, the crowns will weaken and produce thin, spindly stalks.

So, what is the secret? You treat rhubarb as an annual, or you dig up the roots and refrigerate them. Both methods work, but they require different levels of effort.

Choosing The Right Varieties

Not all rhubarb is created equal. Some varieties are more tolerant of heat than others. Look for low-chill types that have been bred for warmer regions.

Victoria: A classic variety that is somewhat forgiving.
Riverside Giant: Known for its thick stalks and better heat tolerance.
Glaskin’s Perpetual: This one is often recommended for warmer climates.
Cherry Red: Produces sweet, red stalks and handles mild winters.

Stay away from varieties that require a hard, prolonged freeze. Stick with the ones listed above to give yourself a fighting chance.

Now that you have the right variety, it is time to get planting. The process is slightly different from northern gardening, but the basics remain the same. You need rich soil, consistent moisture, and a plan for the summer heat.

Timing Your Planting

In the South, you should plant rhubarb in the fall or very early spring. Fall planting is ideal because it gives the roots time to establish before the heat arrives. If you plant in spring, do it as soon as the soil is workable.

Wait for a cool spell in October or November.
Prepare your soil by mixing in compost.
Plant crowns about 2 inches deep.
Space them at least 3 feet apart.

Do not plant too late in the spring. The heat will stress the young plants and they may not survive.

Soil Preparation Is Key

Rhubarb loves rich, well-draining soil. In the South, our clay soils can be a problem. You need to amend the soil heavily before planting.

Mix in 4 to 6 inches of organic compost.
Add aged manure for extra nutrients.
Ensure the pH is between 6.0 and 6.8.
Raised beds are highly recommended for drainage.

If your soil is heavy clay, consider building a raised bed. This will prevent waterlogged roots, which cause rot. Good drainage is non-negotiable for rhubarb.

Watering And Mulching

Southern summers are brutal. Rhubarb needs consistent moisture to survive. However, it does not like to sit in soggy soil. The goal is even, steady moisture.

Use a thick layer of mulch around the plants. This helps keep the soil cool and retains moisture. Pine straw, wood chips, or shredded leaves all work well.

Water deeply once or twice a week.
Check the soil moisture with your finger.
Increase watering during dry spells.
Do not let the soil dry out completely.

Mulch is your best friend in the South. It keeps the roots cool, which is critical for rhubarb. Replenish the mulch layer as it breaks down.

Managing The Summer Heat

Even with the best care, rhubarb will struggle when temperatures consistently exceed 90°F. The leaves may wilt, and growth will slow. This is normal.

You have two options when the heat arrives. You can let the plant go dormant, or you can dig up the crowns and store them in the fridge. The second option is more reliable for a good harvest next year.

The Refrigerator Method

This method mimics a natural winter. It tricks the rhubarb into thinking it has experienced a cold season. It sounds complicated, but it is actually quite simple.

In late fall, dig up the rhubarb crowns.
Shake off excess soil.
Place the crowns in a plastic bag with some damp peat moss.
Store them in the refrigerator for 6 to 8 weeks.
Replant them in the garden in late winter.

This method ensures the rhubarb gets the chill hours it needs. It is the most reliable way to grow rhubarb in the deep South. Just make sure the fridge is set between 33°F and 40°F.

Shade Cloth Strategy

If you prefer not to dig up your plants, you can try providing afternoon shade. Erect a shade cloth over the rhubarb during the hottest part of the day. This can reduce stress and help the plant survive the summer.

Position the shade cloth so it blocks the intense afternoon sun but allows morning light. This mimics the cooler, cloudier conditions rhubarb prefers. It is not a perfect solution, but it can help.

Fertilizing For Success

Rhubarb is a heavy feeder. It needs plenty of nutrients to produce those thick stalks. In the South, you need to fertilize more frequently because rain can leach nutrients from the soil.

Use a balanced fertilizer, like a 10-10-10, in early spring. Then, side-dress with compost mid-season. Avoid high-nitrogen fertilizers, which encourage leaf growth at the expense of stalks.

Apply fertilizer in early spring.
Side-dress with compost in June.
Stop fertilizing by August.
Do not fertilize in the fall.

Over-fertilizing can cause the stalks to become hollow and weak. Stick to a moderate feeding schedule. The plant will reward you with better quality stalks.

Harvesting Your Rhubarb

In the first year, resist the urge to harvest. Let the plant establish its root system. You can start harvesting lightly in the second year. This patience pays off with a stronger plant.

When you do harvest, pull the stalks rather than cutting them. Grasp the stalk near the base and pull it away from the crown. This encourages new growth.

Harvest stalks that are at least 12 inches long.
Take only a third of the stalks at a time.
Remove the leaves immediately, as they are toxic.
Stop harvesting by early summer.

Never eat the leaves of rhubarb. They contain oxalic acid, which is poisonous. The stalks are perfectly safe to eat, but the leaves must be discarded.

Common Problems And Solutions

Southern gardeners face unique challenges with rhubarb. Pests and diseases can be more prevalent in warm, humid climates. Here are some common issues and how to handle them.

Bolting And Flowering

When rhubarb gets too hot, it may bolt and produce flower stalks. This is a sign of stress. Cut the flower stalks off as soon as you see them. This directs energy back into the roots and stalks.

Bolting is common in the South. Do not panic. Just remove the flower stalks and keep the plant watered. It will recover when the weather cools.

Root Rot

Excess moisture and poor drainage cause root rot. This is a serious problem. If the leaves turn yellow and the plant looks wilted, check the roots. If they are mushy and brown, the plant is likely beyond saving.

Prevent root rot by planting in raised beds and ensuring good drainage. Do not overwater. Let the top inch of soil dry out between waterings.

Crown Rot

This fungal disease attacks the crown of the plant. It is often caused by poor air circulation and high humidity. Space your plants properly and avoid overhead watering.

Water at the base of the plant instead of from above. This keeps the foliage dry and reduces the risk of fungal diseases. Good air flow is essential.

Growing Rhubarb In Containers

If you have very limited space or poor soil, consider growing rhubarb in large containers. This gives you more control over the growing conditions. It also makes it easier to move the plant to a cooler location.

Choose a container that is at least 18 inches deep and wide. Use a high-quality potting mix. Ensure the container has drainage holes at the bottom.

Use a 15-gallon container or larger.
Place the container in partial shade.
Water more frequently than in-ground plants.
Move the container to a cool spot in summer.

Container-grown rhubarb will need more attention. The soil dries out faster, and the roots are more exposed to temperature swings. But it is a viable option for southern gardeners.

Frequently Asked Questions

Here are some common questions about growing rhubarb in warm climates. These should help clarify any remaining doubts you have.

Can Rhubarb Survive A Southern Summer?

Yes, but it will go dormant. The plant will die back to the ground and wait for cooler weather. You can also dig up the crowns and store them in the fridge to simulate winter.

What Is The Best Month To Plant Rhubarb In The South?

October or November is ideal. This gives the plant time to establish roots before the heat of the following summer. Early spring planting is also possible, but fall is preferred.

Why Is My Rhubarb Not Growing?

It likely did not receive enough chill hours. Without a cold period, the plant will not break dormancy properly. Try the refrigerator method next year to ensure it gets the chill it needs.

Can I Grow Rhubarb In Florida Or Texas?

Yes, but only with careful management. You must use the refrigerator method or treat it as an annual. The heat in these states is extreme, so afternoon shade is critical.

How Long Does Rhubarb Live In The South?

It can live for several years, but productivity declines after the second year. Many southern gardeners replant every year or two to maintain vigor. Treating it as a short-lived perennial is realistic.

Final Thoughts On Southern Rhubarb

Growing rhubarb in the South is not impossible. It just requires a shift in mindset. You cannot treat it like a northern gardener would. You must be proactive about the heat and the chill requirement.

Start with the right variety, plant at the right time, and be ready to intervene during the summer. Whether you use the refrigerator method or provide shade, your efforts will be rewarded with delicious, tart stalks.

Remember that rhubarb is a cool-season crop. In the South, your harvest window will be shorter. Enjoy it while it lasts. The taste of homegrown rhubarb pie is worth the extra effort.

Do not get discouraged if your first attempt is not perfect. Gardening is a learning process. Each season, you will learn more about what works in your specific microclimate. Keep trying, and you will find a method that works for you.

So, go ahead and try it. With a little planning and some southern ingenuity, you can enjoy this northern classic right in your own backyard. The key is to work with the climate, not against it. Your rhubarb will thank you for it.