Sun Gold Tomato in Zone 5A — Great Plains

Sun Gold tomatoes are practically candy right off the vine, and their early maturity makes them a winner even in our shorter Plains growing season. These golden gems are intensely sweet and versatile, perfect for snacking, salads, or a quick sauce. The satisfaction of harvesting armfuls of these beauties after a long winter is hard to beat.

Sure, the Plains throws its share of curveballs – extreme temperature swings, hail risk, and variable rainfall. But with a little planning and attention to timing, you can absolutely enjoy a bountiful Sun Gold harvest within our roughly 168-day growing season.

Starting Sun Gold tomato seeds indoors from late March through mid April gives them a head start before our unpredictable springs fully settle. You have about a 3-week window, so don't feel rushed. Aim for about 6 weeks before you plan to transplant them outdoors.

Use seed trays or small pots filled with a good seed-starting mix. Keep them warm (around 70-75°F) and provide plenty of light – a grow light works wonders. Don't forget to water from the bottom to encourage strong root growth and prevent damping off. Our springs can be all over the place, so indoor starting is the best way to get these tomatoes going strong.

Transplant your Sun Gold tomato seedlings outdoors from early May through early June, once the risk of frost has passed. This gives you a generous window to get them in the ground. Before planting, harden them off by gradually exposing them to outdoor conditions for about a week.

Space plants 24-36 inches apart in a sunny spot with well-drained soil. Be mindful of late cold snaps or even hail as you set them out. Wind protection is also essential in many parts of the Plains, so consider a sheltered location.

Sun Gold tomatoes are thirsty plants, and consistent watering is key to preventing cracking and ensuring a prolific harvest. Given our hot summers and variable rainfall, you'll need to pay close attention to their moisture needs.

During the peak of summer, aim to give your plants about 1-2 inches of water per week, especially if rainfall is scarce. Stick your finger about 2 inches deep into the soil – if it feels dry, it's time to water. Water deeply at the base of the plant to avoid wetting the foliage, which can encourage disease in our low-to-moderate humidity.

Overwatering can be just as problematic as underwatering. Watch for yellowing leaves or signs of root rot, which indicate the soil is staying too wet. Mulching around the base of the plants helps retain moisture and regulate soil temperature, reducing the need for frequent watering.

Sun Gold tomatoes are vigorous indeterminate growers, meaning they'll keep growing and producing all season long. They need strong support to keep them off the ground and prevent sprawling.

Tall cages or sturdy stakes work best for Sun Golds. Install the support at planting time to avoid disturbing the roots later. As the plant grows, gently guide the stems through the cage or tie them to the stake with soft twine.

Given our windy conditions, make sure your support system is well-anchored to prevent it from toppling over. Consider a location that offers some wind protection, such as near a fence or building.

Sun Gold tomatoes are notorious for their sprawling growth habit, so regular pruning is essential to keep them manageable and productive. If you don't prune, you'll end up with a tangled mess.

Pinch off the "suckers" that grow in the crotch between the main stem and branches. This directs the plant's energy towards fruit production. You can also remove the lower leaves as the plant grows to improve air circulation and prevent disease.

As the end of the season approaches (early October in the Plains), 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 from early July through late August, depending on when you transplanted. These tomatoes ripen quickly, so check them frequently.

Ripe Sun Golds will be a vibrant orange-gold color and slightly soft to the touch. They're intensely sweet when fully ripe and almost fall off the vine. Gently twist or snip the tomatoes from the plant, being careful not to damage the stems.

To encourage continued production, harvest regularly and remove any overripe or damaged tomatoes. As the first frost approaches, harvest any remaining green tomatoes and bring them indoors to ripen. They'll still develop a good flavor, even off the vine.

Here are three common problems you might encounter with Sun Gold tomatoes in the Great Plains:

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: Inconsistent watering, especially heavy watering after a dry spell. The fruit absorbs water faster than the skin can expand.
• How to fix/prevent it: Water consistently and deeply, especially during dry periods. Mulch to maintain even soil moisture. Harvest promptly when ripe.

Over-Production

• What it looks like: So many tomatoes you don't know what to do with them all.
• What causes it: Sun Golds are just prolific!
• How to fix/prevent it: Plant fewer plants next year. Share with neighbors. Learn to can or make sauce.

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 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 spread. Rotate crops yearly.

Great Plains Specific Challenges: Our region's hot summers can stress tomato plants, making them more susceptible to disease and cracking. Variable rainfall can also make it difficult to maintain consistent soil moisture. Wind can damage plants and spread disease spores. But by choosing the right varieties, providing proper support, and paying close attention to watering, you can overcome these challenges and enjoy a bountiful harvest.

Companion planting can help your Sun Gold tomatoes thrive in the Great Plains. Basil is a classic companion, repelling pests like tomato hornworms and whiteflies. Carrots improve soil drainage and aeration, benefiting tomato roots. Parsley attracts beneficial insects that prey on tomato pests. French marigolds repel nematodes and other soil pests.

Avoid planting tomatoes near brassicas (cabbage, broccoli, kale), which can stunt their growth. Fennel inhibits the growth of many plants, including tomatoes. Corn can attract pests and diseases that also affect tomatoes, and it also deprives tomatoes of sunlight.