Celebrity Tomato in Zone 9A — Southern California

Celebrity Tomato is a winner for SoCal gardens. It's a reliable producer of classic, flavorful tomatoes perfect for slicing, salads, and sauces. Plus, its disease resistance is a real advantage here, helping it thrive even with our occasional temperature swings and the need for careful watering during our long, dry summers.

While we face challenges like drought and summer heat inland, Celebrity's relatively short maturity time means you can get a great harvest before the worst of the heat hits. Our extended growing season, about 322 days long, gives you plenty of time to get those delicious tomatoes.

Starting your Celebrity Tomato seeds indoors is the way to go here in Southern California. Aim to start them late December through mid January, about six weeks before you plan to transplant them outside. This gives them a head start before our very-early spring kicks into gear.

You'll need seed trays, a good seed-starting mix, and a warm, sunny spot or grow lights. Keep the soil consistently moist, especially when those seedlings sprout. Bottom watering is a great trick – set the tray in a shallow dish of water and let the soil soak it up from below. This prevents damping off and keeps the leaves dry.

Transplant your Celebrity Tomato seedlings outdoors mid February through mid March. Before you do, harden them off by gradually exposing them to outdoor conditions for about a week. Start with an hour or two of shade, then slowly increase the sun exposure each day.

Plant them 24-36 inches apart in well-drained soil. Keep an eye on the weather during this time — we can sometimes get unexpected late cold snaps, even here in sunny SoCal. If frost threatens, be ready to cover your young plants.

Consistent watering is key for Celebrity Tomatoes, especially in our Southern California climate. They aren't drought-tolerant, so you need to stay on top of it. The goal is to keep the soil consistently moist, but not soggy.

During our mild winters and early spring, when rainfall is more frequent, you may only need to supplement with watering once or twice a week, providing about 1 inch of water each time. As the weather heats up in late spring and summer, especially if you're gardening inland, you'll likely need to water more frequently, perhaps every other day or even daily during the hottest stretches. Use the "finger test" – stick your finger about 2 inches deep into the soil. If it feels dry, it's time to water. Aim for 1-2 inches of water per week, depending on the heat.

Water at the base of the plant to avoid getting the leaves wet, which can encourage fungal diseases even with our low-to-moderate humidity. Signs of underwatering include wilting leaves and blossom end rot. Overwatering can lead to yellowing leaves and root rot. Adding a layer of mulch around your tomato plants helps retain moisture in the soil and keeps the roots cooler, which is especially beneficial during our hot summers.

Celebrity Tomatoes are considered determinate, but they can still get fairly large, so providing support is essential. A sturdy cage or stake is the best option. Medium-height cages usually work well for this variety.

Install the support at planting time to avoid damaging the roots later. As the plant grows, gently guide the branches inside the cage or tie them to the stake. This prevents the heavy fruit from weighing down the plant and breaking the stems.

You can expect your first Celebrity Tomatoes to ripen late April through mid June, about 70 days after transplanting. Look for medium-large, red fruit that is firm but has a slight give when gently squeezed.

To harvest, simply twist or cut the tomato from the vine, being careful not to damage the plant. Regular harvesting encourages continued production. As we approach mid- December and the possibility of our first frost, keep an eye on the forecast. If frost threatens, harvest any remaining green tomatoes and bring them indoors to ripen. They'll ripen just fine on a sunny windowsill.

Here are a few common problems to watch out for with Celebrity Tomatoes in Southern California:

Blossom Drop

• What it looks like: Flowers fall off the plant without setting fruit. Small fruit turns yellow and drops. The plant itself looks healthy, but you get no tomatoes.
• What causes it: Temperature stress is the main culprit. Our nights staying above 75°F or days exceeding 95°F can prevent fruit set. Low humidity, excess nitrogen, or poor pollination can also contribute.
• How to fix/prevent it: Be patient – fruit set usually resumes when temperatures moderate. Provide afternoon shade during extreme heat inland. Keep plants well-watered. Avoid over-fertilizing with nitrogen. Try hand-pollination by gently shaking the flower clusters.

Hornworms

• What it looks like: Large sections of leaves are stripped overnight. You might find large (up to 4 inches long) green caterpillars with white diagonal stripes. Look for dark droppings on the leaves below.
• What causes it: These are the larvae of hawk moths. The moths lay their eggs on tomato family plants, and the caterpillars are voracious eaters.
• How to fix/prevent it: Handpicking is very effective. Bt (Bacillus thuringiensis) spray is an organic option that targets caterpillars. If you see hornworms covered in white cocoons, leave them alone – those are parasitic wasp eggs that will eventually kill the hornworm and release more beneficial wasps into your garden.

Early Blight

• What it looks like: Brown spots with concentric rings (a target or bullseye pattern) appear on the lower leaves first, then spread upward. Affected leaves turn yellow and drop off.
• What causes it: This is a fungal disease (Alternaria solani) that thrives in warm, humid conditions. It spreads via soil splashing onto the lower leaves.
• How to fix/prevent it: Remove and destroy any affected leaves (don't compost them). Mulch around the base of the plant to prevent soil splash. Water at the base of the plant, not overhead. Improve air circulation by spacing plants adequately and pruning if necessary. Copper fungicide can help slow the spread of the disease. Rotate your crops yearly to prevent the fungus from building up in the soil.

Southern California Specific Challenges: Our hot, dry summers inland can stress Celebrity Tomatoes, making them more susceptible to blossom drop and other issues. Consistent watering is crucial, but you need to be mindful of fungal diseases. Good air circulation and avoiding overhead watering are important for managing humidity. Santa Ana winds can also dry out plants quickly, so be prepared to provide extra water and protection during these events.

Companion planting can give your Celebrity Tomatoes a boost here in Southern California. Basil is a great choice – it repels pests and is said to improve the flavor of tomatoes. Carrots and parsley also make good companions, attracting beneficial insects that prey on tomato pests. French marigolds are known for their nematode-repelling properties.

Avoid planting brassicas (like cabbage and broccoli), fennel, or corn near your tomatoes. Brassicas can stunt tomato growth, fennel inhibits the growth of many plants, and corn can attract tomato pests.