How to Grow Nightshade Vegetables in Your Backyard

How to Grow Nightshade Vegetables in Your Backyard

How to Grow Nightshade Vegetables in Your Backyard

Growing nightshade vegetables like tomatoes, peppers, eggplants, and potatoes in your backyard can be very rewarding. Here is a comprehensive guide on how to successfully grow these tasty and nutritious plants.

Choosing the Right Location

When choosing where to plant nightshades, I need to consider these factors:


  • Nightshades need at least 6-8 hours of direct sunlight per day. A sunny location is ideal.

  • If the only spot that gets enough sun is against a wall or fence, I’ll need to allow extra space between the plants and structure to ensure adequate airflow.


  • Nightshades thrive in fertile, well-draining soil rich in organic matter.

  • If my soil is heavy clay, I’ll need to amend it with compost or other organic materials to improve drainage.

  • Avoid planting nightshades where tomatoes, peppers, eggplants, or potatoes have grown in the past 3 years to prevent disease.

Air Circulation

  • Good airflow is crucial to prevent fungal diseases. Avoid low-lying areas or spots with poor air circulation.


  • Ensure there is a water source nearby for irrigation. Drip irrigation is ideal.

  • Avoid wet sites that could lead to root rot.

Preparing the Soil

Proper soil preparation is vital for growing healthy, productive nightshades:

  • Test the soil pH. Nightshades prefer a pH between 6.0-6.8. I’ll amend if needed.

  • Add compost or other organic matter. This will increase nutrients and improve soil structure.

  • Dig garden beds at least 6-12 inches deep and 2-3 feet wide to allow ample root growth.

  • Mix in a balanced fertilizer like 10-10-10 a few weeks before planting.

  • Consider raised beds if the native soil is very poor. They provide better drainage.

Selecting Varieties

There are many excellent nightshade varieties to choose from. Some key factors to consider are:

  • Climate – Choose early season, cool weather types for northern climates. Heat and drought tolerant varieties are best for southern regions.

  • Use – Cherry tomatoes for snacking, paste tomatoes for sauce, slicing tomatoes for sandwiches. Bell vs. hot peppers. White vs. green eggplant.

  • Maturity – Combine early, mid, and late season varieties for a longer harvest.

  • Disease resistance – Many newer varieties are bred for resistance to common nightshade diseases like blight and wilt.

  • Space requirements – Compact or dwarf varieties for tight spaces. Indeterminate tomatoes need cages or staking.

Planting Nightshades

Here are some tips for successfully planting nightshade seedlings or transplants:

  • Harden off plants for 7-10 days before transplanting outside.

  • Wait until after the last spring frost and soil has warmed to at least 65°F.

  • Transplant on a cloudy day or in late afternoon to avoid stressing plants.

  • Dig a hole the same depth as the root ball and pack soil firmly around stems.

  • Space plants appropriately: tomatoes 3 feet apart, peppers 18-24 inches, eggplants 2-3 feet.

  • Water transplants daily for the first week until established.

  • Consider using row covers or hot caps to protect tender plants.

Caring for Nightshades

To keep my nightshade plants healthy and productive through the season, I will:

  • Water deeply at the base of plants 1-2 times per week. Use drip irrigation if possible.

  • Mulch beds with straw, leaves, or grass clippings to retain moisture.

  • Fertilize monthly with a balanced organic fertilizer.

  • Prune plants regularly – pinch off suckers on tomatoes, thin interior pepper foliage.

  • Stake, cage, or trellis tomatoes and peppers to support fruit.

  • Scout for pests like hornworms, beetles, and mites. Remove by hand or use Bacillus thuringiensis.

  • Control weeds by hand pulling or mulching. They compete for nutrients and water.

Harvesting Nightshades

  • Pick tomatoes when fully colored but still firm. Store at room temperature, not refrigerated.

  • For best flavor, harvest peppers when firm and full size. Wear gloves for hot peppers.

  • Cut eggplants when the skin is glossy and firm. Refrigerate promptly.

  • Dig potatoes after the vines have died back. Cure for 2 weeks in a dark, cool place before storing.

Saving Seeds (Optional)

  • Tomato, pepper, and eggplant seeds can be saved from open-pollinated or heirloom varieties.

  • Allow the fruit to ripen fully on the vine before harvesting for seeds.

  • Scoop out the seeds and pulp, place in a jar, add water, and let ferment 2-3 days.

  • Rinse the fermented mixture in a strainer and spread seeds on paper to dry completely.

  • Store dried seeds in envelopes in a cool, dark place. Use within 1-3 years for best viability.

Growing these delicious and versatile nightshades is very rewarding. With proper site selection, soil preparation, plant care, and harvesting, I can enjoy their bounty right in my own backyard.