Early Girl Tomato in Zone 10B — Southern California

Early Girl Tomato is a fantastic choice for Southern California gardens. Its early maturity means you'll be enjoying delicious, medium-sized red tomatoes weeks before other varieties, offering a taste of summer starting in mid-March. Plus, they're incredibly versatile in the kitchen, perfect for fresh salads, sandwiches, or a simple summer sauce.

Our SoCal climate, with its long growing season and mild winters, gives us a huge advantage. While we face challenges like drought and summer heat inland, starting Early Girl Tomatoes indoors and timing your transplant right allows you to get a jump start and harvest before the worst of the heat hits. We have about 355 days to work with!

Starting your Early Girl Tomato seeds indoors in early to late December gives them a head start. This is especially important in Southern California to get a harvest before the intense summer heat inland.

Use seed trays or small pots filled with seed-starting mix. Provide warmth with a heat mat (optional but helpful) and 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.

Given our very-early spring character here in SoCal, getting those seeds going indoors now is the key to a successful early harvest.

Transplant your Early Girl Tomato seedlings outdoors from late January through early March, once 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 sunlight and temperatures.

Space your plants 24-36 inches apart in a sunny spot with well-draining soil. At this time of year, we sometimes experience late-season rains or unexpected temperature swings, so keep an eye on the forecast and be prepared to protect young plants if needed.

Early Girl Tomatoes need consistent moisture to produce a bountiful crop, but overwatering can be just as detrimental, especially in our climate. During the cooler months of late January through March, when rainfall is more frequent, you might only need to supplement with watering once or twice a week, giving them about 1-2 inches of water each time.

As the weather warms up in April and May, especially if you're further inland where the summer heat is more intense, increase watering to 2-3 times a week, providing 2 inches of water each time. Use the "finger test" – 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 low-to-moderate humidity.

Signs of underwatering include wilting leaves and slow growth. Overwatering can lead to yellowing leaves and root rot. A good layer of mulch around your plants helps retain moisture and regulate soil temperature, which is crucial during our hot summers.

Early Girl Tomatoes are an indeterminate variety, meaning they'll keep growing and producing fruit throughout the season. This makes providing support essential.

Standard 5-foot tomato cages or sturdy stakes work well. Install the support at planting time to avoid disturbing the roots later. As the plant grows, gently guide the stems into the cage or tie them to the stake with soft twine.

Pruning Early Girl Tomatoes helps improve air circulation and encourages earlier ripening, which is perfect for getting the most out of our long growing season. Focus on removing the suckers that grow in the "armpit" between the main stem and branches. These suckers will develop into new stems and leaves, but they'll also divert energy from fruit production.

Also, remove the lower leaves that touch the soil, as these are prone to fungal diseases. Start pruning a few weeks after transplanting and continue throughout the growing season. As our first frost approaches around late December, you can top the plant to encourage the remaining green tomatoes to ripen.

You can expect your first harvest of Early Girl Tomatoes from mid-March through mid-May, depending on when you transplanted them. The fruits are ready to pick when they turn a deep red color and are slightly soft to the touch.

Gently twist or snip the tomato from the vine, being careful not to damage the plant. To encourage continued production, harvest tomatoes regularly as they ripen. As we approach late December and the possibility of frost, harvest any remaining green tomatoes and bring them indoors to ripen. They'll ripen best in a single layer, out of direct sunlight.

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 tomato.
• What causes it: Calcium deficiency due to inconsistent watering. Our drought-prone climate can make it hard to maintain even soil moisture.
• How to fix/prevent it: Water consistently, especially during dry spells. Mulch heavily. Avoid over-fertilizing with nitrogen. Remove affected fruit.
• Early Blight
• What it looks like: Brown spots with concentric rings on lower leaves, spreading upward. Leaves yellow and drop.
• What causes it: Fungal disease that thrives in warm conditions. Soil splash spreads the fungus, especially during our winter-wet season.
• How to fix/prevent it: Remove affected leaves. Mulch to prevent soil splash. Water at the base of the plant. Improve air circulation through spacing and pruning. Copper fungicide can slow the spread.
• Hornworms
• What it looks like: Large sections of leaves stripped overnight. You might see large green caterpillars with white stripes and dark droppings.
• What causes it: Larvae of hawk moths. They can defoliate plants quickly if left unchecked.
• How to fix/prevent it: Handpick them (they're easy to spot). Bt spray is effective and organic.
• Cracking
• What it looks like: Splits in the tomato skin, either concentric circles around the stem or lines radiating from the stem.
• What causes it: Heavy watering after a dry spell. Common after our irregular winter rains.
• How to fix/prevent it: Water consistently. Mulch to maintain even moisture. Harvest promptly when ripe.

Southern California Specific Challenges: Our hot summers inland, combined with low-to-moderate humidity and periodic Santa Ana winds, can stress tomato plants. Consistent watering is key to preventing blossom end rot and cracking. Mulching helps retain moisture and regulate soil temperature. Be vigilant about pests like hornworms, which can quickly decimate a plant during the growing season.

Companion planting can help your Early Girl Tomatoes thrive in Southern California. Basil is a great companion because it repels tomato hornworms and whiteflies. Carrots improve the soil and deter nematodes. Parsley attracts beneficial insects that prey on tomato pests. French marigolds repel nematodes and other soil pests, plus they add a pop of color to your garden.

Avoid planting brassicas (like broccoli, cabbage, and kale) near tomatoes because they compete for nutrients. Fennel inhibits the growth of many plants, including tomatoes. Corn attracts tomato fruitworms, so it's best to keep them separated.