Early Girl Tomato in Zone 10A — Southern California

Early Girl Tomato is a winner in Southern California gardens because it delivers that classic tomato flavor early in the season. You'll be enjoying fresh, homegrown tomatoes in salads, sandwiches, and sauces sooner than with almost any other variety. Plus, its versatility makes it a staple for any SoCal gardener aiming for a year-round harvest.

We face challenges like drought and intense summer heat inland, but Early Girl's relatively short maturity time means you can harvest before the worst of the heat hits. With our long 349-day growing season, you'll have plenty of time to get a great crop of these tasty tomatoes.

Starting Early Girl Tomato seeds indoors from mid-December through early January gives you a head start on the season. This timing is about 6 weeks before you'll want to transplant them outdoors. Use seed trays filled with a good seed-starting mix and keep them warm – a heat mat helps.

Provide plenty of light, either from a grow light or a very sunny window. It's best to water from the bottom by setting the tray in a shallow dish of water. Southern California's very-early spring character means you'll be ready to transplant before you know it!

Transplant your Early Girl Tomato seedlings outdoors from late January through mid-March, once they've developed several sets of true leaves. Before planting, harden them off by gradually exposing them to outdoor conditions for about a week. This helps them adjust to the sun and wind.

Space your plants 24-36 inches apart to give them room to grow. Keep an eye on the weather at transplant time; unexpected temperature swings can happen even with our mild winters.

Early Girl Tomatoes need consistent moisture, especially in our semi-arid climate. They aren't drought-tolerant, so regular watering is key for a good harvest. During the cooler months, you might only need to water once or twice a week, but during our hot summers inland, you might need to water every day.

Use the "finger test" – stick your finger into the soil 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 the weather. Water at the base of the plant to avoid getting the leaves wet, which can lead to fungal problems in our climate, even with low-to-moderate humidity.

Signs of underwatering include wilting leaves and slow growth. Overwatering can cause yellowing leaves and root rot. Mulching around your tomato plants with straw or wood chips helps retain moisture and keeps the soil cool, which is especially helpful during our hot summers and water restrictions.

Early Girl Tomatoes are indeterminate, meaning they'll keep growing and producing fruit throughout the season. You'll need to provide support to keep them off the ground and prevent the stems from breaking under the weight of the tomatoes. Standard 5-foot tomato cages or sturdy stakes work well.

Install the support at planting time to avoid damaging the roots later. As the plant grows, gently guide the stems through the cage or tie them to the stake with soft twine.

Pruning your Early Girl Tomato plants can help improve air circulation and encourage earlier ripening, which is a big advantage with this variety. Focus on removing the suckers that grow between the main stem and the branches. These suckers won't produce much fruit but will take energy away from the rest of the plant.

Also, remove the lower leaves that touch the soil to prevent the spread of disease. Prune regularly throughout the season. As the first frost approaches around late December, you can remove the top of the plant to encourage the remaining tomatoes to ripen.

You can expect your first harvest of Early Girl Tomatoes from mid-March through late May, about 50 days after transplanting. The tomatoes are ready to pick when they turn a deep red color and are slightly soft to the touch. Gently twist the tomato off the vine, being careful not to damage the plant.

Harvest regularly to encourage continued production. If a surprise cold snap threatens before they're fully ripe, you can pick the green tomatoes and ripen them indoors in a paper bag. With proper care, you can enjoy a continuous harvest of delicious Early Girl Tomatoes throughout the season.

Here are some common problems you might encounter with Early Girl Tomatoes in Southern California:

Blossom End Rot

• What it looks like: Sunken, dark brown or black leathery patch on the bottom of the fruit.
• What causes it: Calcium deficiency caused by inconsistent watering. Our drought/flood cycles are often the culprit.
• How to fix/prevent it: Water consistently! Mulch heavily to maintain even soil moisture. Don't over-fertilize with nitrogen. Remove affected fruit.

Early Blight

• What it looks like: Brown spots with concentric rings (target pattern) on lower leaves first, spreading upward. Leaves yellow and drop.
• What causes it: Fungal disease (Alternaria solani) that thrives in warm, humid conditions, spread by soil splash.
• How to fix/prevent it: Remove and destroy affected leaves. Mulch to prevent soil splash. Water at the base. Improve air circulation. Copper fungicide slows spread. Rotate crops yearly.

Hornworms

• What it looks like: Large sections of leaves stripped overnight. Large (up to 4 inches) green caterpillars with white diagonal stripes.
• What causes it: Larvae of hawk moths that can defoliate plants quickly.
• How to fix/prevent it: Handpick (they don't bite). Bt (Bacillus thuringiensis) spray is effective and organic. Leave hornworms with white cocoons on them — they're being parasitized.

Cracking

• What it looks like: Splits in tomato skin – either concentric (circles around stem) or radial (lines radiating from stem).
• What causes it: Heavy watering or rain after a dry spell. Fruit absorbs water faster than 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.

Southern California Specific Challenges: Our hot summers inland can stress tomato plants, making them more susceptible to blossom end rot and sunscald. Low-to-moderate humidity helps reduce fungal diseases, but Santa Ana winds can quickly dry out the soil. Be sure to monitor your plants closely and adjust your watering schedule as needed.

Companion planting can help your Early Girl Tomatoes thrive. Basil is a great companion because it repels tomato hornworms and other pests. Carrots improve the soil around tomatoes and may even enhance their flavor. Parsley attracts beneficial insects that prey on tomato pests. French marigolds deter nematodes in the soil.

Avoid planting brassicas (like cabbage and broccoli) near tomatoes, as they can stunt their growth. Fennel inhibits the growth of many plants, including tomatoes. Corn can block sunlight and compete for nutrients, especially in smaller SoCal gardens.