Best Tomatoes To Grow In Idaho

Idaho’s high altitude and intense sunlight require tomato varieties that can handle UV exposure and cool mountain nights. If you’re searching for the best tomatoes to grow in idaho, you need types that mature fast and resist sunscald. This guide covers everything from seed selection to harvest tips for your Idaho garden.

Tomatoes love heat, but Idaho’s weather can be tricky. Summer days are hot, but nights drop fast. You need varieties that set fruit in cooler temps. Let’s get into the top picks for your garden.

These varieties thrive in Idaho’s unique climate. They handle short seasons, intense sun, and chilly nights. Each one is tested for success in the Gem State.

Early Maturing Varieties

Short summers mean you need tomatoes that ripen fast. Look for days to maturity under 70 days. These are your best bets for a reliable harvest.

Early Girl: Ripens in 50-60 days. Great for slicing. Handles cool nights well.
Stupice: A Czech heirloom that matures in 55 days. Produces small, flavorful fruits even in cold weather.
Sub Arctic Plenty: Bred for short seasons. Ready in 45-50 days. Perfect for high elevations.
Glacier: Another cold-tolerant choice. Matures in 55 days. Sweet and tangy taste.

These early types give you tomatoes before frost hits. Plant them after the last frost date, usually mid-May in most Idaho areas.

Sunscald Resistant Varieties

Idaho’s intense sunlight can burn tomato skins. Sunscald shows as white or yellow patches on fruit. Pick varieties with heavy foliage to protect the tomatoes.

Brandywine: Thick leaves shield fruit from UV rays. Heirloom flavor is unbeatable. Takes 80-90 days to mature.
Cherokee Purple: Dark skin absorbs less light. Rich, smoky taste. Needs 80 days.
San Marzano: Paste tomato with dense foliage. Great for sauces. Matures in 80 days.
Roma: Compact plant with lots of leaves. Resists cracking and sunscald. Ready in 75 days.

Provide afternoon shade if you see sunscald on other varieties. A shade cloth can help during heat waves.

Determinate Vs Indeterminate Types

Know the difference before planting. Determinate tomatoes grow to a fixed size and ripen all at once. Indeterminate keep growing and producing until frost.

For Idaho, determinate types are often easier. They finish before cold weather hits. Indeterminate need more care but give a longer harvest.

Determinate: Bushy, no staking needed. Good for containers. Examples: Roma, Celebrity, Bush Early Girl.
Indeterminate: Vining, need cages or trellises. Produce over months. Examples: Sun Gold, Big Boy, Brandywine.

Mix both types for a steady supply. Determinate for canning, indeterminate for fresh eating.

Cherry And Small Fruit Varieties

Small tomatoes ripen faster and handle stress better. They’re perfect for Idaho’s unpredictable weather. Kids love popping them straight off the vine.

Sun Gold: Super sweet orange cherry. Ripens in 55 days. Very productive.
Sweet 100: Red cherry with high yields. Resists cracking. Ready in 65 days.
Yellow Pear: Heirloom with mild flavor. Fun shape. Matures in 70 days.
Black Cherry: Dark, rich taste. Good for salads. Takes 65 days.

These are also great for hanging baskets. They trail down and look beautiful on a patio.

Cold Frame And Greenhouse Options

Extend your season with a cold frame or greenhouse. This lets you grow larger, later-maturing varieties. Even in northern Idaho, you can get a bumper crop.

Use a cold frame to start seeds early. Transplant into the garden after frost. A greenhouse gives you full control over temperature.

Beefsteak: Huge slicers need warmth. Grow in greenhouse for best results. Takes 85 days.
Mortgage Lifter: Heirloom with massive fruits. Needs consistent heat. Matures in 85 days.
Big Boy: Classic hybrid. Produces well in protected spaces. Ready in 78 days.

Heat the greenhouse at night if temps drop below 50°F. Use a small space heater or thermal mass like water barrels.

Planting Tips For Idaho Gardens

Success starts with proper planting. Follow these steps to give your tomatoes a strong start. Idaho’s soil and climate need special attention.

Soil Preparation

Tomatoes need rich, well-draining soil. Idaho’s native soil is often clay or sandy. Amend it with organic matter before planting.

Test your soil pH. Tomatoes prefer 6.0 to 6.8.
Add 2-3 inches of compost. Mix it into the top 12 inches.
Work in a balanced fertilizer like 10-10-10. Follow package rates.
If soil is heavy clay, add perlite or sand for drainage.

Raised beds warm up faster in spring. They also drain better. Consider building one if your soil is poor.

Timing And Spacing

Plant after the last frost date. In southern Idaho, that’s around May 10. In northern areas, wait until late May or early June.

Space determinate types 2 feet apart. Indeterminate need 3 feet between plants. Rows should be 4 feet apart for air flow.

Use black plastic mulch to warm the soil. It also prevents weeds and conserves water. Cut slits for the plants.

Watering And Fertilizing

Tomatoes need consistent moisture. Inconsistent watering causes blossom end rot and cracking. Water deeply once a week, more in hot spells.

Water at the base, not on leaves. Wet foliage invites disease.
Use drip irrigation or a soaker hose. This keeps water off the plant.
Mulch with straw or wood chips to retain moisture.
Fertilize every 2 weeks with a liquid tomato food. Stop when fruits set.

Watch for signs of overwatering: yellow leaves or wilting. Adjust your schedule based on rainfall.

Support Systems

Tomatoes need support to keep fruit off the ground. This reduces rot and pest issues. Choose a system that fits your garden size.

Cages: Best for determinate types. Use sturdy wire cages, not flimsy ones.
Stakes: Good for indeterminate. Drive a 6-foot stake next to each plant. Tie stems as they grow.
Trellises: Ideal for small spaces. Train vines up a string or netting.

Install supports at planting time. Adding them later can damage roots. Prune suckers on indeterminate plants for better air flow.

Common Challenges In Idaho

Even with the best tomatoes to grow in idaho, you’ll face some issues. Here’s how to handle them. Prevention is easier than cure.

Frost Protection

Idaho can get frost in late spring and early fall. Protect your plants with these methods:

Cover plants with row covers or old sheets when frost is forecast.
Use cloches or water-filled plastic bottles around each plant.
Plant in the warmest spot of your garden, near a south-facing wall.
Harvest all green tomatoes before a hard frost. They ripen indoors.

Green tomatoes can be wrapped in newspaper and stored in a cool, dark place. Check them weekly for ripeness.

Pest Management

Common pests in Idaho include aphids, hornworms, and whiteflies. Use integrated pest management to keep them in check.

Handpick hornworms. They’re large and easy to spot.
Spray aphids with a strong stream of water. Or use insecticidal soap.
Attract beneficial insects like ladybugs and lacewings. Plant dill, fennel, or marigolds nearby.
Use row covers to block pests from young plants.

Avoid broad-spectrum pesticides. They kill good bugs too. Focus on prevention and early detection.

Disease Prevention

Idaho’s dry climate reduces fungal diseases, but they still happen. Blight and septoria leaf spot are common in wet years.

Water at the base to keep leaves dry.
Space plants for good air circulation.
Remove lower leaves once plants are 2 feet tall.
Rotate tomato crops every 3 years. Don’t plant in the same spot.

If you see signs of disease, remove affected leaves immediately. Dispose of them in the trash, not compost.

Harvesting And Storage

Knowing when to pick is key. Tomatoes taste best when fully ripe on the vine. But in Idaho, you may need to harvest early to beat frost.

Ripening Indoors

If frost threatens, pick all mature green tomatoes. They’ll ripen indoors if given the right conditions.

Sort tomatoes by size. Larger ones ripen slower.
Place them in a single layer in a cardboard box.
Add a ripe apple or banana to speed ripening. They release ethylene gas.
Store in a cool, dark place around 65-70°F.
Check daily and remove ripe ones.

Don’t refrigerate unripe tomatoes. Cold stops the ripening process. Once ripe, use them within a few days.

Preserving The Harvest

Idaho gardeners often get a big harvest all at once. Preserve extra tomatoes for winter use. Here are some methods:

Canning: Make salsa, sauce, or whole tomatoes. Use a pressure canner for low-acid varieties.
Freezing: Wash and freeze whole tomatoes. Use them in soups and stews later.
Drying: Slice and dry in a dehydrator or low oven. Store in airtight jars.
Fermenting: Make your own ketchup or hot sauce. It’s fun and healthy.

Label everything with the date and variety. You’ll thank yourself in January.

Frequently Asked Questions

Here are answers to common questions about growing tomatoes in Idaho. These tips will help you avoid mistakes.

What is the easiest tomato to grow in Idaho?

Early Girl is the easiest. It matures fast, handles cool nights, and produces reliably. Even beginners get good results.

Can I grow heirloom tomatoes in Idaho?

Yes, but choose early-maturing heirlooms like Stupice or Glacier. Late heirlooms like Brandywine need a greenhouse in northern areas.

How do I protect tomatoes from Idaho wind?

Plant in a sheltered spot or use windbreaks. Staking and caging also help. Avoid planting in open, exposed areas.

Should I start tomatoes from seed or buy plants?

Starting from seed gives you more variety. But buying plants is easier for beginners. Start seeds indoors 6-8 weeks before last frost.

What is the best fertilizer for Idaho tomatoes?

Use a balanced fertilizer like 10-10-10 at planting. Switch to a low-nitrogen formula once flowers appear. Too much nitrogen causes leafy growth but few fruits.

With the right varieties and care, you’ll enjoy a bountiful tomato harvest in Idaho. Stick to early, sun-tolerant types and protect them from frost. Your garden will reward you with delicious, homegrown tomatoes all summer long.