Sun Gold Tomato in Zone 10A — Florida

Sun Gold tomatoes are practically candy – intensely sweet and bursting with flavor. They're perfect for snacking straight from the vine, adding to salads, or even grilling. In Florida, where we can garden nearly year-round, getting a jump start on these little gems ensures a delicious early harvest before the real heat of summer sets in.

Our Florida gardening calendar is different, and we face challenges like humidity and nematodes. But by starting your Sun Golds indoors and timing your transplant just right, you can enjoy a bountiful harvest during our prime growing season, taking full advantage of our 355-day growing season.

Starting your Sun Gold tomato seeds indoors in early to late December gives them a head start before our mild winter transitions into spring. You have about a 3-week window. Use seed trays or small pots filled with a good seed-starting mix. Provide warmth with a heat mat and plenty of light, either from a grow light or a sunny window.

A great tip for starting seeds is to water them from the bottom. Set the tray in a shallow dish of water and let the soil soak it up. This prevents damping off, which can be a real problem in our humid Florida climate. Remember, our spring is reversed, so getting these started early is key.

Transplant your Sun Gold tomato seedlings outdoors in late January through late February, once they have a few sets of true leaves and the danger of frost has passed. Before planting, harden them off by gradually exposing them to outdoor conditions for about a week. This helps them adjust to the Florida sun and wind.

Space your plants 24-36 inches apart in a sunny spot with well-drained soil. Keep an eye on the weather; even though it's late winter, we can still get unexpected temperature swings. Protect your young plants if a cold snap threatens.

Sun Gold tomatoes are thirsty plants, especially in our Florida heat. They need consistent moisture to produce those delicious, crack-free fruits. Aim to water deeply and regularly, providing about 1-2 inches of water per week, depending on rainfall.

Stick your finger about 2 inches into the soil. If it feels dry, it's time to water. Water at the base of the plant to avoid wetting the leaves, which can encourage fungal diseases in our humid climate. A soaker hose or drip irrigation system works well.

In the dry spring, you'll likely need to water every other day. During our wet summers, you might get away with less frequent watering. Watch for signs of underwatering (wilting leaves) or overwatering (yellowing leaves). Mulching around your tomato plants with pine straw or wood chips helps retain moisture and suppress weeds.

Sun Gold tomatoes are vigorous, indeterminate growers, meaning they'll keep growing and producing all season long if you let them. They need strong support to keep them off the ground and prevent the stems from breaking under the weight of the fruit.

Tall tomato cages or sturdy stakes work best. Install your chosen support at planting time to avoid damaging the roots later. As the plant grows, gently tie the stems to the support with soft twine or plant clips. These plants get BIG, so don't skimp on support.

Sun Gold tomatoes are notorious for their sprawling growth habit. If you don't prune them, they'll quickly take over your garden. The key is to remove the suckers that grow in the crotch between the main stem and the branches.

Pinch off these suckers when they're small to encourage the plant to focus its energy on fruit production. Also, remove the lower leaves as the plant grows to improve air circulation and prevent disease. As the end of our growing season approaches in late December, you can top the plant to encourage the remaining fruit to ripen before any potential frost.

You can expect your first Sun Gold tomato harvest in late March through early May, about 57 days after transplanting. 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.

The easiest way to harvest is to gently twist the tomato until it separates from the vine. Ripe Sun Golds will practically fall into your hand. Harvest regularly to encourage continuous production. As late December approaches and the risk of frost increases, harvest any remaining green tomatoes and ripen them indoors in a paper bag.

Even with the best care, Sun Gold tomatoes can face a few common problems in Florida: cracking, over-production, and early blight.

Cracking:

• What it looks like: Splits in the tomato skin, either concentric circles around the stem or radial lines radiating from it.
• What causes it: Heavy watering or rain after a dry spell. The fruit absorbs water faster than the skin can expand. Some varieties are more prone than others.
• 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: More tomatoes than you can possibly eat, give away, or process.
• What causes it: You've grown a Sun Gold! They are incredibly prolific.
• How to fix/prevent it: Start with fewer plants next year. Learn to make tomato sauce, salsa, or even sun-dried tomatoes. Share with your neighbors!

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.

Florida Specific Challenges: Our hot, humid summers and wet-summer rainfall create the perfect environment for fungal diseases like early blight. The very-high humidity also makes cracking more likely. Nematodes in our sandy soil can also be a problem; consider using nematode-resistant varieties or amending your soil with organic matter.

Companion planting can help your Sun Gold tomatoes thrive in Florida. Basil is a classic companion, improving the flavor of the tomatoes and repelling pests. Carrots and parsley attract beneficial insects that prey on tomato pests. French marigolds deter nematodes in the soil.

Avoid planting brassicas (like cabbage and broccoli) near your tomatoes, as they can stunt their growth. Fennel inhibits the growth of many plants, including tomatoes. Corn can attract pests that also attack tomatoes.