Celebrity Tomato in Zone 9A — Desert Southwest

Celebrity Tomato is a solid choice for Desert Southwest gardeners. It's known for its reliable production of medium-large, flavorful tomatoes, perfect for slicing, salads, and sauces. Plus, its disease resistance makes it a satisfying and relatively easy win, even for beginners.

Sure, we face challenges with extreme heat and alkaline soil here, but the Celebrity's early maturity and our long, 298-day growing season give you a great shot at a bountiful harvest. By starting seeds indoors and paying attention to watering, you can enjoy homegrown tomatoes well before the worst of the summer heat hits.

Start your Celebrity Tomato seeds indoors from mid January through early February, about six weeks before you plan to transplant them outside. Use seed trays or small pots filled with a good seed-starting mix. Keep the soil consistently moist, but not soggy; bottom watering helps prevent damping off.

Provide warmth (around 70-75°F) and plenty of light. A sunny south-facing window might work, but supplemental grow lights are ideal. Remember, our spring is very-early here, so starting on time is crucial.

Transplant your Celebrity Tomato seedlings outdoors from early to late March, after the danger of frost has passed. Before planting, harden off your seedlings by gradually exposing them to outdoor conditions for about a week. This helps them adjust to the sun and wind.

Space the plants 24-36 inches apart to allow for good air circulation. Even in March, our sun can be intense, so consider providing some temporary shade cloth if a heat wave is predicted right after transplanting.

Celebrity Tomatoes need consistent moisture, especially in our arid Desert Southwest climate. They aren't drought-tolerant, so don't let them dry out. Aim to water deeply and regularly.

During the cooler spring months (March-April), water thoroughly about 2-3 times per week, providing about 1-2 inches of water each time. As the temperatures rise in May and June, increase watering to 3-4 times per week, ensuring the soil stays consistently moist. Use the "finger test" – stick your finger about 2 inches into the soil; if it feels dry, it's time to water. During our monsoon season, check soil moisture levels frequently to avoid overwatering.

Water at the base of the plant to avoid wetting the foliage, which can encourage fungal diseases. While our humidity is generally low, early blight can still be a concern. A good layer of organic mulch, like compost or shredded bark, will help retain moisture, suppress weeds, and regulate soil temperature.

Signs of underwatering include wilting leaves and dry soil. Overwatering can lead to yellowing leaves and root rot.

Celebrity Tomatoes are a determinate variety, meaning they grow to a certain size and then produce all their fruit at once. But they are semi-determinate, so they can get fairly large and benefit from support. Medium-height 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 through the cage or tie them to the stake with soft twine. This will keep the fruit off the ground, improve air circulation, and prevent the branches from breaking under the weight of the tomatoes.

You can expect your first Celebrity Tomato harvest from early May through late June, about 70 days after transplanting. The tomatoes are ready to pick when they are a deep red color, firm to the touch, and have a slight give when gently squeezed.

To harvest, gently twist or cut the tomato from the vine, leaving a small piece of stem attached. Regular harvesting encourages continued production. As our first frost approaches in early December, harvest any remaining green tomatoes and bring them indoors to ripen in a warm, dark place.

Here are three common problems you might encounter with Celebrity Tomatoes in the Desert Southwest:

Blossom Drop

• What it looks like: Flowers fall off without setting fruit, or small fruit yellows and drops. The plant looks healthy but produces no tomatoes.
• What causes it: Temperature stress is the main culprit. Our daytime temperatures can soar quickly in spring, and nights can stay warm. Low humidity, excess nitrogen, and 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 with shade cloth. Keep plants well-watered. Avoid over-fertilizing with nitrogen. Gently shake the plants in the morning to encourage pollination.

Hornworms

• What it looks like: Large sections of leaves are stripped overnight. You'll find large (up to 4 inches) green caterpillars with white diagonal stripes and dark droppings on the leaves below.
• What causes it: These are the larvae of hawk moths. They lay their eggs on tomato family plants, and the caterpillars feed voraciously.
• How to fix/prevent it: Handpick the hornworms (they're easy to spot once you know what to look for). Bt (Bacillus thuringiensis) spray is effective and organic. If you see white cocoons on a hornworm, leave it alone – those are parasitic wasp eggs that will kill the hornworm.

Early Blight

• What it looks like: Brown spots with concentric rings (target or bullseye pattern) appear on the lower leaves first and spread upward. Leaves yellow and drop.
• What causes it: This is a fungal disease (Alternaria solani) that thrives in warm conditions and can be spread by monsoon moisture splashing onto lower leaves.
• How to fix/prevent it: Remove and destroy affected leaves. Mulch to prevent soil splash. Water at the base of the plant. Improve air circulation by spacing plants properly and pruning. Copper fungicide can slow the spread. Rotate crops yearly.

Desert Southwest Specific Challenges: The extreme heat, arid humidity, and occasional monsoon rainfall of the Desert Southwest can create a challenging environment for Celebrity Tomatoes. Sunscald can be a problem, so provide afternoon shade during the hottest months. Water deeply and regularly to combat the effects of low humidity.

Companion planting can really help your Celebrity Tomatoes thrive here. Basil is a classic companion, as it repels tomato hornworms and other pests. Carrots improve the soil around tomatoes and deter nematodes. Parsley attracts beneficial insects that prey on tomato pests. French marigolds are excellent at repelling nematodes and other soil-borne pests.

Avoid planting brassicas (like cabbage, broccoli, and cauliflower) near tomatoes, as they can stunt tomato growth. Fennel inhibits the growth of many plants, including tomatoes. Corn can attract pests that also affect tomatoes.