Early Girl Tomato in Zone 3B — Mountain West

Early Girl Tomato is a fantastic choice for us high-altitude gardeners in Zone 3B. Its relatively short 50-day maturity means you'll actually get to enjoy delicious, homegrown tomatoes even with our short season. The flavor is classic tomato – great for slicing, salads, and sauces – and there's nothing quite like the satisfaction of harvesting your own ripe tomatoes before the first frost threatens.

Our Mountain West climate certainly presents challenges: intense sun, cool nights, and a short growing season of around 108 days. But with careful timing and a few tricks, Early Girl can thrive here. We'll focus on getting a head start indoors and protecting them from early frosts so you can enjoy a bountiful harvest.

Starting Early Girl Tomato seeds indoors is essential in our region. Aim to sow your seeds from mid April through mid May, giving them about 6 weeks to get a good head start before transplanting outdoors. This timing allows us to maximize our short growing season, especially with our late springs.

Use seed trays or small pots filled with a good seed-starting mix. Keep the soil consistently moist, but not soggy – bottom watering is a great technique to avoid damping off. Place the trays in a warm location (around 70-75°F) and provide plenty of light, either from a sunny window or a grow light. Remember, our intense Mountain sun, even indoors, can sometimes be too much for delicate seedlings, so monitor for leaf burn.

Transplant your Early Girl Tomato seedlings outdoors from early June through early July, once the danger of frost has passed. Be sure to harden them off for about a week before transplanting. This means gradually exposing them to outdoor conditions, a little more each day, to acclimate them to the intense sun and cooler nights.

When transplanting, space the plants 24-36 inches apart. Keep an eye on the weather forecast – we can still get unexpected cold snaps even in June. If frost threatens, be prepared to cover your young plants with blankets or row covers.

Early Girl Tomatoes need consistent moisture, especially in our dry Mountain West climate, but they are more forgiving than many varieties. Because of our low humidity and dry rainfall, you'll need to water regularly to keep them happy.

During the peak of summer, you'll likely need to water deeply about 2-3 times per week, providing about 1-2 inches of water each time. The "finger test" is a good way to check: stick your finger about 2 inches into the soil near the base of the plant. If it feels dry, it's time to water. Water at the base of the plant to avoid wetting the leaves and reducing the risk of fungal diseases.

Signs of underwatering include wilting leaves and dry, cracked soil. Overwatering can lead to yellowing leaves and root rot. A good layer of mulch, like straw or wood chips, will help retain moisture in the soil and reduce the need for frequent watering. In our dry climate, mulching is a must!

Early Girl Tomatoes are indeterminate, meaning they'll keep growing and producing fruit throughout the season. Because of this growth habit, they definitely need support to keep the heavy fruits off the ground.

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. This will help prevent the plant from sprawling and keep the fruit clean and off the ground.

Pruning Early Girl Tomatoes can help promote earlier ripening, which is a big advantage in our short season. Focus on removing the suckers that grow in the "armpit" between the main stem and the branches.

Pinch off these suckers when they're small, ideally early in the season. You can also remove some of the lower leaves to improve air circulation and prevent disease. As the first frost approaches in early September, consider topping the plant (cutting off the top) to encourage the remaining green tomatoes to ripen.

You can expect your first Early Girl Tomato harvest from late July through early September. The fruits are ready to pick when they turn a deep red color and are slightly soft to the touch.

Gently twist or cut the tomato from the vine, being careful not to damage the plant. Regular harvesting encourages continued production. As the first frost approaches in early September, harvest any remaining green tomatoes and bring them indoors to ripen. They'll ripen best in a warm, dark place.

Here are some common problems you might encounter with Early Girl Tomatoes in our region:

Blossom End Rot

• What it looks like: A sunken, dark brown or black leathery patch on the bottom of the tomato. Often affects the first fruits of the season.
• What causes it: Inconsistent watering, which leads to calcium deficiency. Our dry summers and alkaline soil can exacerbate this.
• How to fix/prevent it: Water consistently and deeply. Mulch heavily to maintain even soil moisture. Avoid over-fertilizing with nitrogen.

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: A fungal disease that thrives in warm, humid conditions. Soil splash spreads it. While our humidity is low, watering practices can still contribute.
• 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.

Hornworms

• What it looks like: Large sections of leaves stripped overnight. Large green caterpillars with white stripes. Dark droppings on leaves below.
• What causes it: Voracious caterpillars that can defoliate plants quickly.
• How to fix/prevent it: Handpick them (they're surprisingly easy to spot once you know what to look for). Bt spray is effective.

Cracking

• What it looks like: Splits in the tomato skin, either concentric or radial.
• What causes it: 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.

Mountain West Specific Challenges: Our moderate-at-altitude heat and low humidity can actually be beneficial in reducing some disease pressures. However, our dry rainfall and alkaline soil mean you need to be extra vigilant about consistent watering and soil amendments to prevent blossom end rot and cracking. The intense UV can also cause sunscald on the fruits, so ensure adequate foliage cover or provide shade during the hottest part of the day.

Companion planting can be a great way to improve the health and productivity of your Early Girl Tomatoes.

Good companions include:

• Basil: Improves tomato flavor and repels pests.
• Carrots: Loosen the soil and deter root-knot nematodes.
• Parsley: Attracts beneficial insects.
• French Marigolds: Repel nematodes and other soil pests.

Avoid planting these near your tomatoes:

• Brassicas (cabbage, broccoli, kale): Can stunt tomato growth.
• Fennel: Inhibits the growth of many plants, including tomatoes.
• Corn: Can attract tomato pests like the corn earworm.