Sun Gold Tomato in Zone 8A — Pacific Northwest

Sun Gold tomatoes are practically candy, and their early maturity makes them a fantastic choice for Pacific Northwest gardens. The bright, sweet flavor shines in salads, sauces, or just popped straight from the vine. Plus, the sheer abundance of these little gems is incredibly rewarding in our mild summer climate.

While our springs can be cool and our summers aren't as scorching as other regions, Sun Golds thrive here with a little planning. Our 203-day growing season gives you plenty of time to enjoy a bumper crop if you get them off to a good start. Don't worry, it's totally doable!

Starting Sun Gold tomato seeds indoors in early to late March gives them a head start on our sometimes-slow springs. You have about a 3-week window to get them going. Use seed trays or small pots filled with a good seed-starting mix. Keep them warm (around 70-75°F) using a heat mat, and provide plenty of light with grow lights, especially during our often overcast spring days.

Bottom watering is a great way to keep the soil consistently moist without overwatering. Just set the tray in a shallow container of water and let the soil soak it up from the bottom. This encourages strong root growth, which is essential for transplanting success.

Remember, our springs can be cool, so don't rush to put them outside too early. Patience is key!

Transplant your Sun Gold tomato seedlings outdoors from late April through late May, after the danger of frost has passed. It's better to wait if the weather is still chilly. Harden off your seedlings for about a week before transplanting by gradually exposing them to outdoor conditions. This helps them adjust to the sun and wind, preventing transplant shock.

Space your plants 24-36 inches apart to give them room to grow. Our cool nights can sometimes lead to blossom drop, so wait until the soil has warmed up a bit before planting.

Sun Gold tomatoes need consistent watering, especially in our dry summer months. While our summers are mild, we still experience dry spells. These tomatoes are thirsty plants, and inconsistent watering can lead to cracked fruit.

Check the soil moisture by sticking your finger about 2 inches deep. If it feels dry, it's time to water. Aim for about 1-2 inches of water per week, depending on rainfall. Water deeply at the base of the plant to encourage strong root growth and avoid wetting the foliage, which can increase the risk of disease.

Signs of underwatering include wilting leaves and slow growth. Overwatering can lead to yellowing leaves and root rot. Mulching around the base of the plant helps retain moisture and regulate soil temperature, which is especially helpful during our dry summers.

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 them from sprawling. Cages or sturdy stakes work well.

Install the support at planting time to avoid disturbing the roots later. These plants get BIG, so choose a tall, sturdy cage. As the plant grows, gently guide the stems through the cage or tie them to the stake with soft twine.

Sun Gold tomatoes are notorious for their sprawling growth habit, and will take over if you let them. Regular pruning is essential to keep them manageable and encourage fruit production. Focus on removing suckers, which are the small shoots that grow in the "armpit" between the main stem and the branches.

Prune suckers early in the morning on a dry day to help prevent disease. Leave the main stem and the branches that produce fruit. As the end of the season approaches (late October), you can top the plant to encourage the remaining green tomatoes to ripen before the first frost.

You can expect your first Sun Gold tomato harvest from mid June through early August, depending on when you transplanted. The tomatoes are ripe when they turn a bright orange-gold color and are slightly soft to the touch. The flavor will be intensely sweet. Sometimes they'll even drop from the vine when they're perfectly ripe.

Gently twist or snip the tomatoes from the vine to avoid damaging the plant. Sun Golds are continuous producers, so keep harvesting regularly to encourage more fruit. As the first frost approaches (late October), harvest any remaining green tomatoes and bring them indoors to ripen.

To ripen green tomatoes indoors, place them in a paper bag with a banana or apple. The ethylene gas released by these fruits will speed up the ripening process.

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

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 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

• What it looks like: So many tomatoes that you can't keep up! Vines collapsing under the weight of the fruit.
• What causes it: Sun Golds are prolific producers, especially in our mild summers.
• How to fix/prevent it: Harvest frequently. Share with neighbors. Make sauce, jam, or freeze them for later. Sturdy support is essential to handle the weight.

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.

Pacific Northwest Specific Challenges: Our mild summers and dry-summer humidity can create conditions favorable for early blight. Late blight can also be a concern, especially during wet springs. Consistent watering is key to preventing cracking, but be mindful of overwatering, especially during cool, overcast springs. Slugs can also be a problem, especially for young plants.

Good companions for Sun Gold tomatoes include basil, carrots, parsley, and French marigolds. Basil is said to improve the flavor of tomatoes and repel pests. Carrots help loosen the soil and don't compete for nutrients. Parsley attracts beneficial insects. French marigolds repel nematodes and other soil pests.

Avoid planting tomatoes near brassicas (cabbage, broccoli, kale), fennel, and corn. Brassicas can stunt tomato growth. Fennel inhibits the growth of many plants. Corn can attract pests that also affect tomatoes. Planting the right companions can help your Sun Golds thrive in our PNW gardens.