Early Girl Tomato in Zone 4B — Mountain West

Early Girl Tomato is a fantastic choice for us high-altitude gardeners here in the Mountain West. Its relatively short time to maturity means you actually get to savor homegrown tomatoes, bursting with that intense, sun-ripened flavor we love. Plus, they're incredibly versatile for everything from fresh salads to sauces, bringing a taste of summer to your table even with our shorter growing season.

Our Mountain climate does present challenges like intense UV, cool nights, and the risk of early frosts. But with careful timing and a few tricks, Early Girl Tomato is absolutely achievable. Our 128-day growing season can be enough to enjoy a good harvest if you get started right.

Starting your Early Girl Tomato seeds indoors is key to getting a head start in our short season. Aim to sow your seeds from early April through early May, about six weeks before you plan to transplant them outside. Use seed trays with a good seed-starting mix, and provide consistent warmth (around 70-75°F) to encourage germination.

A sunny windowsill might not be enough; consider supplemental light from a grow lamp, especially with our intense sun which can still be weak in early spring. One trick I've found helpful is to bottom-water your seedlings. Set the tray in a shallow dish of water, and let the soil absorb the moisture from the bottom. This encourages strong root growth and prevents damping-off, which can be a problem when our spring weather is still unpredictable. Remember, spring here often starts late, so be patient!

Transplanting your Early Girl Tomato seedlings outdoors should happen from late May through early July, once the risk of frost has passed. Before you move them permanently, harden them off. This means gradually exposing them to outdoor conditions for about a week. Start with an hour or two of shade, increasing the time and sun exposure each day.

Plant your seedlings 24-36 inches apart in a sunny spot with well-drained soil. Keep an eye on the forecast; we can still get surprise frosts in late May or even early June. Be ready to cover your plants if necessary.

Consistent watering is vital for Early Girl Tomato, especially here in the Mountain West where our humidity is low and rainfall is scarce. They aren't very drought tolerant, so you need to stay on top of it. During the peak of summer, you might need to water deeply every few days, providing about 1-2 inches of water per week, depending on the weather.

A good way to check is the "finger test": stick your finger into the soil about 2 inches deep. 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. Signs of underwatering include wilting leaves and slow growth. Overwatering can lead to yellowing leaves and root rot.

Mulching around your tomato plants with straw or wood chips helps retain moisture, suppress weeds, and regulate soil temperature. This is especially important in our climate where we often have hot days and cool nights.

Early Girl Tomato has an indeterminate growth habit, meaning it will keep growing and producing fruit throughout the season. This means it needs strong support. I recommend using either sturdy cages or tall stakes.

Install your support system at planting time to avoid disturbing the roots later. For cages, choose ones that are at least 5 feet tall. If you're using stakes, drive them firmly into the ground a few inches from the plant. As the plant grows, gently tie the main stem to the stake with soft twine or fabric strips. This will keep the plant upright and prevent the fruit from weighing it down.

Pruning Early Girl Tomato can help improve airflow and encourage earlier ripening, which is crucial in our short season. Focus on removing the suckers that grow in the "crotch" between the main stem and branches. These suckers will eventually produce their own stems, leaves, and fruit, but they can also divert energy from the main plant.

Remove the lower suckers early in the season to promote faster ripening of the existing fruit. As the end of the season approaches (mid- September in the Mountain West), consider topping the plant. This means cutting off the top of the main stem to stop further vertical growth. This will encourage the plant to focus its energy on ripening the remaining fruit before the first frost.

You can expect your first Early Girl Tomato harvest from mid July through mid September, depending on when you transplanted. The fruits are ready to pick when they turn a deep, even red color and are slightly soft to the touch. They are a medium-sized fruit.

Gently twist or cut the tomato from the vine, being careful not to damage the plant. Regular harvesting encourages continued production, so check your plants every few days. As the first frost approaches, harvest any remaining green tomatoes. These can be ripened indoors by placing them in a paper bag with an apple or banana. The ethylene gas released by these fruits will help the tomatoes ripen.

Here are some common issues 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 tomato. It often affects the first fruits of the season.
• What causes it: Inconsistent watering, which leads to calcium deficiency. Our dry climate and tendency for sporadic summer thunderstorms can create this problem.
• How to fix/prevent it: Water deeply and consistently, especially during fruit development. Mulch heavily to maintain even soil moisture. Avoid over-fertilizing with nitrogen. Remove affected fruit.
• Early Blight
• What it looks like: Brown spots with concentric rings (a target pattern) on the lower leaves, spreading upward. Leaves yellow and drop.
• What causes it: A fungal disease that thrives in warm, humid conditions. It spreads through soil splash 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 adequately and pruning. Copper fungicide can slow the spread.
• Hornworms
• What it looks like: Large sections of leaves stripped overnight. Large green caterpillars with white diagonal stripes. Dark droppings on leaves below.
• What causes it: These are the larvae of hawk moths. They can defoliate plants very quickly.
• How to fix/prevent it: Handpick them (they're big, so easy to spot). Bt (Bacillus thuringiensis) spray is effective and organic. Leave hornworms with white cocoons on them; these are beneficial parasitic wasp eggs.
• Cracking
• What it looks like: Splits in the 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 the dry/wet cycle. Mulch to maintain even moisture. Harvest promptly when ripe.

Mountain West Specific Challenges: Our moderate-at-altitude heat, low humidity, and dry rainfall can be a mixed bag for Early Girl Tomato. The intense sun and cool nights enhance the flavor, but the dry conditions demand vigilant watering to prevent blossom end rot and cracking. Hail can also be devastating, so consider using row covers or other protection if hail is in the forecast.

Companion planting can give your Early Girl Tomato a boost. Basil is a classic companion; it repels pests like tomato hornworms and whiteflies. Carrots planted nearby can improve soil aeration and deter nematodes. Parsley attracts beneficial insects like hoverflies, which prey on aphids. French marigolds deter nematodes and other soil pests.

Avoid planting brassicas (like cabbage, broccoli, and kale) near tomatoes, as they can stunt their growth. Fennel inhibits the growth of many plants, including tomatoes. Corn can also create too much shade and compete for nutrients. Choose companions that complement your tomatoes in our Mountain climate.