Sun Gold Tomato in Zone 6A — Southeast

Sun Gold tomatoes are practically candy right off the vine, and their early maturity makes them a winner in our Southeast gardens. Their intense sweetness and versatility in the kitchen – from salads to sauces – make them worth the effort, and there's nothing quite like the satisfaction of popping these sun-kissed gems into your mouth after a long, hot day working in the garden.

We definitely have our share of challenges here in the Southeast, with the humidity and disease pressure, but our long 198-day growing season gives us plenty of time to get a fantastic harvest of Sun Golds. With a little planning and attention, you can enjoy these tasty treats all summer long.

Starting your Sun Gold tomato seeds indoors in early to late March gives them a head start on our long summer. This is especially important since we want those sweet tomatoes coming in before the worst of the summer heat hits. Our spring here in the Southeast is moderate, so starting indoors protects them from any late frosts.

Use seed trays or small pots filled with a good seed-starting mix. Keep the soil consistently moist, and consider bottom watering to avoid damping off. A heat mat underneath can speed up germination, and once they sprout, make sure they get plenty of light – a grow light works wonders.

Transplant your Sun Gold tomato seedlings outdoors from late April through late May, once the danger of frost has passed. Before transplanting, harden them off by gradually exposing them to outdoor conditions for about a week. This helps them adjust to the sun and wind.

Choose a sunny spot with well-drained soil and space the plants 24-36 inches apart. Even though our last frost is typically early April, keep an eye on the forecast – those late cold snaps can still happen. A row cover can protect your young plants if needed.

Sun Golds are thirsty plants, especially in our hot and humid Southeast summers. They need consistent moisture to produce those abundant, sweet fruits. The "finger test" is your friend: stick your finger about 2 inches deep into the soil. If it feels dry, it's time to water.

During the hottest part of the summer, you might need to water deeply every few days, providing about 1-2 inches of water per week, depending on rainfall. Water at the base of the plant to avoid wetting the foliage, which can encourage fungal diseases in our humid climate. Overhead watering is a recipe for disaster here.

Signs of underwatering include wilting leaves and blossom end rot. Overwatering can lead to yellowing leaves and root rot. Mulching around the base of the plants with straw or pine straw helps retain moisture and suppress weeds.

Sun Gold tomatoes are vigorous indeterminate plants, meaning they'll keep growing and producing all season long. They need strong support to keep them off the ground and prevent sprawling. These are one of the most aggressive growers, so be prepared.

Tall tomato cages or sturdy stakes work best. Install the support at planting time to avoid disturbing the roots later. As the plant grows, gently tie the stems to the support using soft twine or plant ties.

Pruning is essential for managing Sun Gold tomatoes in our Southeast gardens. If you don't prune, these plants will quickly take over your entire garden space. Focus on removing suckers, which are the small shoots that grow in the "V" between the main stem and the branches.

Prune regularly throughout the growing season, especially early on. This directs the plant's energy into fruit production rather than excessive foliage. As the first frost approaches in late October, you can top the plant to encourage the remaining green tomatoes to ripen.

Get ready for a flood of delicious tomatoes! You can typically expect your first harvest of Sun Golds from mid June through early August. The tomatoes are ready to pick when they turn a vibrant orange-gold color, feel slightly soft to the touch, and have an intensely sweet aroma. They'll practically fall off the vine when they're perfectly ripe.

Gently twist or snip the tomatoes from the vine, being careful not to damage the plant. Regular harvesting encourages continued production. As the end of the season approaches and frost threatens, harvest any remaining green tomatoes and bring them indoors to ripen. They'll still be delicious, even if they don't quite match the sun-ripened flavor.

Even with the best care, you might encounter a few problems with your Sun Gold tomatoes in the Southeast. Here are three common ones:

Cracking

• What it looks like: Splits in the tomato skin, either concentric circles around the stem or radial lines radiating from the stem.
• What causes it: Heavy watering or rain after a dry spell. The fruit absorbs water faster than the skin can expand. Sun Golds are particularly prone to cracking.
• How to fix/prevent it: Water consistently to avoid the dry/wet cycle. Mulch to maintain even moisture. Harvest promptly when ripe.

Over-production

• What it looks like: An overwhelming amount of tomatoes that you can't possibly eat or give away fast enough.
• What causes it: Sun Golds are incredibly prolific. It's a good problem to have, but can be overwhelming.
• How to fix/prevent it: Plant fewer plants next year! Get creative with preserving – canning, freezing, drying. Share with neighbors, friends, and food banks.

Early Blight

• What it looks like: Brown spots with concentric rings (target or bullseye pattern) on lower leaves first, spreading upward. Leaves yellow and drop.
• What causes it: A fungal disease (Alternaria solani) that thrives in our warm, humid conditions. It spreads via soil splash onto lower leaves.
• How to fix/prevent it: Remove and destroy affected leaves (don't compost). Mulch to prevent soil splash. Water at the base, not overhead. Improve air circulation through spacing and pruning. Copper fungicide can slow the spread. Rotate crops yearly.

Southeast Specific Challenges: Our hot, humid summers and wet-summer rainfall create the perfect environment for fungal diseases like early blight. The humidity makes it crucial to water at the base of the plants and provide good air circulation. Also, Japanese beetles can be a nuisance, so be prepared to handpick them or use appropriate organic controls.

Companion planting can help your Sun Gold tomatoes thrive in the Southeast. Basil is a classic companion because it repels tomato hornworms and other pests, plus it improves the flavor of the tomatoes. Carrots are also beneficial because they loosen the soil and attract beneficial insects. Parsley attracts hoverflies, which prey on aphids. French marigolds deter nematodes and other soil pests.

Avoid planting brassicas (cabbage, broccoli, cauliflower) near tomatoes, as they can stunt their growth. Fennel inhibits the growth of many plants, including tomatoes. Corn can attract tomato hornworms and block sunlight.