Sun Gold Tomato in Zone 7A — Northern California

Sun Gold Tomatoes are practically sunshine in fruit form, and they thrive in our Northern California gardens. Their intense sweetness makes them perfect for snacking right off the vine, adding bursts of flavor to salads, or even grilling. Plus, in our mild Mediterranean climate, you'll be picking these little gems for what feels like forever.

We all know about drought and unpredictable weather patterns here, and water restrictions are always on our minds. But with a little planning and attention, you can absolutely enjoy a bumper crop of Sun Golds. Our long, 235-day growing season gives you plenty of time to get them established and producing.

Starting Sun Gold Tomato seeds indoors gives you a head start on our long growing season. Aim to sow your seeds from mid-February through early March. That's about six weeks before you plan to transplant them outdoors.

You'll need seed trays or small pots, a good seed-starting mix, and a warm, bright location. A heat mat can help speed up germination. Bottom watering is the way to go! Set your seed trays in a shallow tray of water and let the soil soak it up. It prevents damping off and keeps the seedlings evenly moist. With our early spring warmth, you'll see sprouts in no time.

Once the danger of frost has passed, usually from early April through early May, it's time to transplant your Sun Gold seedlings outdoors. Be sure to harden them off first. This means gradually exposing them to outdoor conditions for about a week before planting.

Space your plants 24-36 inches apart in a sunny spot with well-drained soil. We can still get some cool nights and occasional showers at this time of year, so protect young transplants if necessary.

Sun Golds are thirsty plants, especially in our dry Northern California summers. Consistent watering is key to preventing fruit cracking and ensuring a good harvest. You'll need to stay on top of it, especially with those water restrictions.

During the hottest parts of summer, you might need to water deeply two or three times a week. Use the finger test to check soil moisture about two inches deep. If it feels dry, it's time to water. Aim for about 1-2 inches of water per week, depending on the weather. Water at the base of the plant to avoid wetting the leaves. Overhead watering can encourage fungal diseases in our microclimates.

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 helps retain moisture and keeps the soil cool, which is especially important here.

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. Without it, they'll sprawl, making them susceptible to pests and diseases.

Tall, sturdy cages are a great option, or you can use stakes. Install the support at planting time to avoid disturbing 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'll take over your garden! These are some of the most enthusiastic tomato growers around. Regular pruning is essential to keep them manageable and productive.

Focus on removing suckers, which are the small shoots that grow in the "V" between the main stem and the branches. Pinch them off when they're small. Toward the end of the season, around early November when our first frost threatens, you can top the plants to encourage the remaining tomatoes to ripen.

Get ready for a cascade of sweet, golden tomatoes! Sun Golds typically start ripening from late May through mid-July, depending on when you transplanted. They're ready to pick when they turn a deep orange-gold color and feel slightly soft to the touch. They practically fall off the vine when they're perfectly ripe.

Gently twist or snip the tomatoes from the plant to avoid damaging the stems. Regular harvesting encourages continued production. As our first frost approaches in early November, harvest any remaining green tomatoes and bring them indoors to ripen. They'll still taste delicious!

Even in our lovely Northern California gardens, Sun Gold Tomatoes can run into a few problems:

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 or rain after a dry spell. The fruit absorbs water too quickly, causing the skin to split.
• How to fix/prevent it: Water consistently and deeply. Mulch to maintain even soil moisture. Harvest ripe tomatoes promptly.

Over-Production:

• What it looks like: An overwhelming amount of tomatoes ripening all at once.
• What causes it: Sun Golds are just naturally prolific!
• How to fix/prevent it: Harvest frequently! Share with neighbors, make sauces, or freeze them for later.

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 conditions. Spreads via soil splash onto lower leaves.
• How to fix/prevent it: Remove and destroy affected leaves. Mulch to prevent soil splash. Water at the base, not overhead. Improve air circulation through spacing and pruning. Copper fungicide can slow the spread.

Northern California Specific Challenges: Our dry summers and the potential for water restrictions mean you need to be extra vigilant about consistent watering. Mulching is crucial for retaining moisture. Also, be aware of your specific microclimate, as some areas can experience more humidity than others, which can increase the risk of fungal diseases.

Companion planting can help your Sun Gold Tomatoes thrive. Basil is a classic companion, improving flavor and deterring pests. Carrots and parsley attract beneficial insects that prey on tomato pests. French marigolds repel nematodes and other soil pests.

Avoid planting brassicas (like cabbage and broccoli) near your tomatoes, as they can stunt their growth. Fennel inhibits the growth of many plants, so keep it away. Corn can attract tomato pests, so it's best to keep them separated.