Early Girl Tomato in Zone 3A — Mountain West

Early Girl Tomato is a fantastic choice for us high-altitude gardeners. The relatively short time to maturity means you actually get to enjoy that homegrown tomato flavor, even with our short growing season. Plus, nothing beats a fresh tomato sandwich on a cool summer evening after a day of intense sun here in the Mountain West.

Our high altitude, intense sun, and cool nights definitely present challenges, but Early Girl's quick growth habit helps us beat the frost. With a little planning and attention to our 96-day growing season, you can harvest plenty of delicious tomatoes.

Starting Early Girl Tomato seeds indoors gives them a head start against our late spring. Aim to sow seeds late April through mid May, roughly six weeks before you plan to transplant them outside. This timing is crucial because we often get snow even in May!

Use seed trays with a good quality seed-starting mix. Keep the soil consistently moist, and bottom watering is your best friend here to prevent damping off. Provide warmth (a heat mat is ideal) and plenty of light – a grow light is essential, as our spring days can still be pretty cloudy.

Transplant your Early Girl Tomato seedlings outdoors mid June through early July, once the danger of frost has passed. Before transplanting, harden off your seedlings. This means gradually exposing them to outdoor conditions for about a week.

Space plants 24-36 inches apart in a sunny spot. Our intense mountain sun means they need plenty of room to breathe. Keep an eye on the weather forecast – even in June, we can get unexpected cold snaps or even hail that can damage young plants.

Consistent watering is critical for Early Girl Tomatoes, especially in our dry Mountain climate. These tomatoes need a lot of water and aren't drought-tolerant. During the peak of summer, when we get those 85°F days, check the soil moisture regularly using the finger test – stick your finger about 2 inches deep. If it feels dry, it's time to water.

Aim for about 1-2 inches of water per week, especially during fruit development. Water deeply at the base of the plant rather than overhead. Our low humidity reduces the risk of fungal diseases.

Signs of underwatering include wilting leaves and blossom end rot. Overwatering can lead to yellowing leaves and root rot. Mulching around the base of the plants helps retain moisture and regulate soil temperature, a lifesaver in our climate.

Early Girl Tomato is an indeterminate variety, meaning it will keep growing and producing fruit throughout the season. Because of this, it needs strong support. Standard 5-foot cages or sturdy stakes work well.

Install your chosen support system at planting time to avoid disturbing the roots later. As the plant grows, gently weave the stems through the cage or tie them to the stake using soft twine. This will keep the plant upright, prevent the fruit from touching the ground, and maximize sun exposure.

Pruning Early Girl Tomato helps promote earlier ripening, which is key in our short-season climate. Focus on removing the suckers that grow in the "armpit" between the main stem and branches. These suckers steal energy from fruit production.

Prune regularly throughout the season, especially the lower suckers near the base of the plant. As the first frost approaches around early September, consider topping the plant (cutting off the top) to encourage the remaining tomatoes to ripen.

You can expect your first Early Girl Tomato harvest early August through early September, about 50 days after transplanting. The fruit is ready when it turns a deep red color and feels 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, harvest any remaining green tomatoes and bring them indoors to ripen. They'll still taste great, even if they don't get quite as much sun-kissed flavor.

Here are some common problems you might encounter with Early Girl Tomato in the Mountain West:

Blossom End Rot

• What it looks like: A sunken, dark brown or black leathery patch on the bottom of the fruit. It often affects the first fruits of the season.
• What causes it: Calcium deficiency caused by inconsistent watering. This is common in our climate due to fluctuating moisture levels.
• How to fix/prevent it: Water consistently, especially during dry spells. Mulch heavily to maintain even soil moisture. Remove affected fruit.

Early Blight

• What it looks like: Brown spots with concentric rings (target or bullseye 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 onto lower leaves.
• How to fix/prevent it: Remove and destroy affected leaves. Mulch to prevent soil splash. Water at the base, not overhead. Improve air circulation through spacing and pruning.

Hornworms

• What it looks like: Large sections of leaves stripped overnight. Large green caterpillars with white diagonal stripes.
• What causes it: Larvae of hawk moths. They can defoliate plants quickly.
• How to fix/prevent it: Handpick them (they don't bite!). Bt spray is effective and organic.

Cracking

• What it looks like: Splits in tomato skin – either concentric (circles around the stem) or radial (lines radiating from the stem).
• 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 dry/wet cycles. Mulch to maintain even moisture. Harvest promptly when ripe.

Mountain West Specific Challenges: Our moderate-at-altitude heat, low humidity, and dry rainfall mean that consistent watering and mulching are essential for preventing blossom end rot and cracking. The intense UV can also stress plants, so providing some afternoon shade during the hottest part of the day can be beneficial, especially for young plants.

Companion planting can significantly benefit your Early Girl Tomatoes. Basil is a classic companion because it repels pests like tomato hornworms and whiteflies. Carrots improve soil aeration and attract beneficial insects. Parsley attracts hoverflies, which prey on aphids. French marigolds deter nematodes and other soil pests.

Avoid planting brassicas (cabbage, broccoli, kale) near tomatoes, as they can stunt tomato growth. Fennel inhibits the growth of many plants, including tomatoes. Corn can shade tomatoes, reducing sunlight exposure, which is crucial in our short growing season.