Sun Gold Tomato in Zone 8A — Southeast

Sun Gold tomatoes are practically candy, and in our long summer here in the Southeast, you'll get a ton of them. Their intense sweetness and manageable size make them perfect for snacking straight off the vine, adding to salads, or even roasting for a concentrated burst of flavor. Plus, there's a real satisfaction in growing something so delicious yourself!

We all know the challenges of gardening in the Southeast: the humidity, the clay soil, and the ever-present threat of pests and diseases. But don't worry, with a little planning and the right timing, you can absolutely grow beautiful Sun Golds. Our long 245-day growing season gives you plenty of opportunity for success.

Starting Sun Gold tomato seeds indoors is the way to go here in the Southeast. Get those seeds going early February through early March, about six weeks before you plan to transplant them outside. This gives them a head start before our hot and humid summer hits.

You'll need seed trays or small pots, a good seed-starting mix, and a warm, sunny spot or grow lights. Keep the soil consistently moist, and try bottom watering – set the trays in a shallow pan of water and let the soil soak it up from the bottom. It helps prevent damping off and keeps the seedlings healthy. Our springs here tend to be moderate, so keep an eye on the weather, but starting indoors gives you more control.

Wait until late March through late April to transplant your Sun Gold seedlings outdoors. By then, the danger of frost should be past, but keep an eye on the forecast – we can still get some cool snaps.

Before transplanting, harden off your seedlings. This means gradually exposing them to outdoor conditions for about a week. Start with an hour or two of shade and slowly increase the time and sun exposure each day. Plant them 24-36 inches apart in well-drained soil.

Sun Gold tomatoes need consistent moisture, especially with our hot and humid summers. These plants are prolific producers, and that takes a lot of water. Plus, their thin skins are prone to cracking if the watering is irregular.

During the spring, when the weather is a bit cooler and we often get afternoon thunderstorms, you might only need to water once or twice a week. But as summer heats up, you'll likely need to water every other day, or even daily, depending on rainfall. Stick your finger about two inches deep into the soil. If it feels dry, it's time to water. Aim for about 1-2 inches of water per week, including rainfall. Water at the base of the plant to avoid wetting the leaves, which can encourage fungal diseases in our humid climate.

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 plant with pine straw or shredded leaves helps retain moisture and keeps the soil cooler.

Sun Gold tomatoes are vigorous indeterminate growers, so they need strong support. If you don't provide it, they'll sprawl all over the ground and become a tangled mess, making it hard to harvest and increasing the risk of disease.

Tall, sturdy cages are a good option, or you can use stakes. Install the support at planting time to avoid damaging the roots later. As the plant grows, gently weave the stems through the cage or tie them to the stake with soft twine.

If you don't prune Sun Golds, they will take over your garden. These plants are known for their aggressive growth, so regular pruning is essential to keep them manageable and productive.

Focus on removing the suckers, which are the small shoots that grow in the "armpit" where a branch meets the main stem. Pinch them off when they're small. Leave the main stem and the fruit-bearing branches. Pruning improves air circulation and directs the plant's energy into producing fruit. As the end of the season approaches (mid- November), you can top the plant to encourage the remaining green tomatoes to ripen before the first frost.

You can expect your first Sun Gold harvest late May through mid July, about 57 days after transplanting. The tomatoes are ready to pick when they turn a vibrant orange-gold color and are slightly soft to the touch. They should also have an intensely sweet aroma.

Sometimes, the ripest tomatoes will even drop from the vine on their own. Gently twist or snip the stem just above the fruit to harvest. Regular harvesting encourages the plant to keep producing. As the first frost approaches in mid- November, harvest any remaining green tomatoes and bring them indoors to ripen. They'll still taste delicious, even if they don't get quite as sweet as vine-ripened ones.

Here are some common problems you might encounter growing Sun Gold tomatoes in the Southeast:

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.
• How to fix/prevent it: Water consistently to avoid the dry/wet cycle. Mulch to maintain even moisture. Harvest promptly when ripe.

Over-production Sun Golds are prolific, and you might find yourself overwhelmed with tomatoes. Give away extras, preserve them in sauces, or roast them for a concentrated flavor.

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: Fungal disease (Alternaria solani) that thrives in our warm, humid conditions. 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 slows the spread. Rotate crops yearly.

Southeast Specific Challenges: Our hot, humid summers and frequent rainfall create the perfect environment for fungal diseases like early blight. Consistent watering is key to preventing cracking, but it can be a balancing act with our wet-summer climate. Keep an eye out for Japanese beetles, too – they love tomato plants.

Companion planting can help your Sun Gold tomatoes thrive in the Southeast. Basil is a great companion because it repels tomato hornworms and other pests. Carrots improve the soil around the tomato plants and can deter nematodes. Parsley attracts beneficial insects that prey on tomato pests. French marigolds repel nematodes and other soil pests.

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