Pennsylvania’s rich soil and moderate rainfall create ideal conditions for perennial vegetables that naturalize easily. If you’re looking for the **best perennial vegetables in Pennsylvania**, you’ve come to the right place. These plants come back year after year, saving you time, money, and effort. They thrive in the Keystone State’s climate, from the cool mountains to the humid southeast. You can plant them once and harvest for seasons to come.
Perennial vegetables are a smart choice for any Pennsylvania gardener. They build deep root systems that improve soil health. They also need less water and fertilizer than annual crops. Plus, they provide early spring harvests when little else is growing. Let’s explore the top options for your garden.
Best Perennial Vegetables In Pennsylvania
This section covers the top perennial vegetables that perform well across Pennsylvania. Each plant is adapted to the state’s varied growing zones, from 5b in the north to 7a in the southeast. You’ll find options for sun and shade, wet and dry spots.
Asparagus: The Spring Classic
Asparagus is a long-lived perennial that can produce for 15 to 20 years. It thrives in Pennsylvania’s well-drained soils and full sun. You’ll need patience the first two years, but the payoff is huge.
- Plant crowns in early spring in a sunny, weed-free bed.
- Space them 18 inches apart in rows 4 feet apart.
- Do not harvest the first year; let ferns grow to feed the roots.
- In year two, harvest for two weeks only.
- From year three onward, harvest for 6 to 8 weeks.
Pennsylvania’s cold winters help asparagus go dormant, which is essential for strong spring growth. Choose varieties like ‘Jersey Knight’ or ‘Mary Washington’ for reliable yields. Mulch beds with straw to suppress weeds and retain moisture.
Rhubarb: The Pie Plant
Rhubarb is not a true vegetable botanically, but it’s used as one in cooking. It thrives in Pennsylvania’s cool springs and tolerates partial shade. The stalks are tart and perfect for sauces, pies, and jams.
- Plant dormant crowns in early spring, with buds 2 inches below soil.
- Space plants 3 feet apart in rich, well-drained soil.
- Do not harvest the first year to allow root establishment.
- In year two, harvest lightly, taking no more than half the stalks.
- Remove flower stalks as they appear to keep energy in the roots.
Rhubarb leaves are toxic, so only eat the stalks. Varieties like ‘Victoria’ and ‘Canada Red’ are popular in Pennsylvania. Divide clumps every 5 to 7 years to keep them productive.
Horseradish: The Zesty Root
Horseradish is a vigorous perennial that can become invasive if not managed. It grows well in Pennsylvania’s fertile, moist soils. The root is ground into a pungent condiment that pairs with beef and seafood.
- Plant root cuttings (called sets) in early spring, 2 inches deep.
- Space them 18 inches apart in rows 3 feet apart.
- Keep soil consistently moist for tender roots.
- Harvest in fall after frost sweetens the flavor.
- Leave small root pieces in the ground to regrow next year.
To control spread, grow horseradish in a buried container or raised bed. ‘Big Top Western’ and ‘Bohemian’ are reliable varieties. Dig roots when they are 1 to 2 inches thick for best quality.
Jerusalem Artichoke: The Sunroot
Also called sunchoke, this sunflower relative produces edible tubers. It grows in poor soil and full sun, making it ideal for Pennsylvania’s less fertile areas. The tubers have a nutty, sweet flavor.
- Plant tubers in spring, 4 inches deep and 12 inches apart.
- They grow 6 to 10 feet tall, so place them at the back of beds.
- Harvest tubers after the first hard frost, when they are sweetest.
- Leave some tubers in the ground for next year’s crop.
- Store harvested tubers in the refrigerator for up to two weeks.
Jerusalem artichokes can spread aggressively. Plant them in a contained area or along a fence. They need no fertilizer or pesticides, making them a low-maintenance choice.
Walking Onion: The Perennial Allium
Also called Egyptian onion or tree onion, this unique plant produces bulbils at the top of the stalk. These bulbils fall over and “walk” across the garden, planting themselves. It thrives in Pennsylvania’s climate with minimal care.
- Plant sets or bulbils in fall or early spring, 2 inches deep.
- Space them 6 inches apart in rows 12 inches apart.
- Harvest green onions in spring and fall.
- Collect bulbils in late summer for replanting or eating.
- Divide clumps every 3 to 4 years to prevent crowding.
Walking onions are cold-hardy and pest-resistant. They provide scallions, shallots, and pickling onions from the same plant. Use them in salads, soups, or stir-fries.
Good King Henry: The Wild Spinach
This lesser-known perennial produces tender leaves that taste like spinach. It grows in full sun to partial shade and tolerates poor soil. Good King Henry is a reliable green for Pennsylvania gardens.
- Start seeds indoors 6 weeks before last frost, or sow directly in spring.
- Space plants 18 inches apart in well-drained soil.
- Harvest young leaves in spring and early summer.
- Remove flower stalks to extend leaf production.
- Mulch heavily in winter to protect roots.
The shoots can be eaten like asparagus when they are 4 to 6 inches tall. Good King Henry is also known as “poor man’s asparagus.” It self-seeds readily, so you’ll have plants for years.
Sea Kale: The Coastal Delicacy
Sea kale is a perennial that produces blanched shoots similar to asparagus. It grows well in Pennsylvania’s well-drained, sandy soils. The young shoots are tender and mild, perfect for steaming or sautéing.
- Plant crowns in spring, 2 inches deep and 18 inches apart.
- Cover shoots with a bucket or pot to blanch them when they emerge.
- Harvest blanched shoots when they are 6 to 8 inches tall.
- After harvest, allow leaves to grow for next year’s energy.
- Divide clumps every 4 to 5 years.
Sea kale is resistant to pests and diseases. It adds a unique, gourmet touch to your garden. The flowers are also attractive to pollinators.
Planting And Care Tips For Pennsylvania
Perennial vegetables need a good start to thrive for years. Follow these tips for success in Pennsylvania’s climate.
Site Selection And Soil Preparation
Choose a sunny location with well-drained soil. Most perennials need at least 6 hours of direct sunlight daily. Test your soil pH and aim for 6.0 to 7.0 for most vegetables.
- Remove all weeds and grass before planting.
- Dig in 2 to 3 inches of compost or well-rotted manure.
- Add a balanced fertilizer like 10-10-10 at planting time.
- Consider raised beds for better drainage in heavy clay soils.
Pennsylvania’s clay soils can be heavy, so amend with organic matter yearly. Sandy soils in the southeast need extra compost to retain moisture. Good drainage prevents root rot in wet winters.
Watering And Mulching
Water deeply once a week during dry spells, especially in the first year. Established plants are more drought-tolerant but still need consistent moisture. Mulch with straw, wood chips, or shredded leaves.
- Apply 2 to 4 inches of mulch around plants.
- Keep mulch away from stems to prevent rot.
- Replenish mulch each spring as it decomposes.
- Use drip irrigation to water at soil level and avoid leaf diseases.
Mulch suppresses weeds, retains moisture, and moderates soil temperature. In Pennsylvania’s hot summers, it keeps roots cool. In winter, it insulates against freeze-thaw cycles.
Fertilizing And Dividing
Perennial vegetables need less fertilizer than annuals, but they benefit from yearly feeding. Apply a balanced organic fertilizer in early spring as new growth appears. Side-dress with compost in mid-summer.
- Use a 5-10-10 fertilizer for root crops like horseradish.
- Apply a nitrogen-rich fertilizer for leafy greens like Good King Henry.
- Divide overcrowded clumps every 3 to 5 years.
- Replant divisions in fresh soil to rejuvenate growth.
Dividing plants keeps them productive and prevents disease. Do this in early spring or fall when plants are dormant. Water divisions well after transplanting.
Pest And Disease Management
Perennial vegetables are generally resilient, but they can face issues. Pennsylvania’s humid summers encourage fungal diseases. Pests like deer, rabbits, and insects may also visit.
Common Pests In Pennsylvania
Deer and rabbits love tender shoots of asparagus and sea kale. Use fencing or repellents to protect your plants. Insect pests include aphids, slugs, and asparagus beetles.
- Handpick asparagus beetles and drop them in soapy water.
- Use diatomaceous earth around plants to deter slugs.
- Spray aphids with a strong stream of water or insecticidal soap.
- Install deer fencing at least 8 feet tall for effective protection.
Companion planting can help. Plant marigolds or garlic near vulnerable crops to repel pests. Encourage beneficial insects like ladybugs and lacewings.
Disease Prevention
Fungal diseases like rust and powdery mildew can affect perennials in wet weather. Good air circulation and proper spacing reduce risk. Avoid overhead watering to keep foliage dry.
- Remove and destroy infected leaves immediately.
- Apply a copper fungicide if diseases persist.
- Rotate planting locations for annual crops, but perennials stay put.
- Choose disease-resistant varieties when available.
Clean garden tools between uses to prevent spreading pathogens. In fall, remove dead foliage to reduce overwintering spores. Healthy plants are less susceptible to disease.
Harvesting And Storing Perennial Vegetables
Harvest at the right time for best flavor and texture. Most perennials are harvested in spring and early summer. Proper storage extends their usability.
When To Harvest
Asparagus spears are ready when they are 6 to 8 inches tall and tips are tight. Rhubarb stalks are best when 12 to 18 inches long and firm. Horseradish roots are dug after frost sweetens them.
- Harvest Jerusalem artichokes after frost for sweetest flavor.
- Pick walking onion bulbils when they turn brown and dry.
- Cut Good King Henry leaves when they are 4 to 6 inches long.
- Blanch sea kale shoots before harvesting for tenderness.
Always use sharp tools to avoid damaging plants. Harvest in the morning when plants are crisp and hydrated. Leave enough foliage for plants to regrow next year.
Storing Your Harvest
Asparagus spears keep in the refrigerator for up to a week. Wrap them in a damp paper towel and store in a plastic bag. Rhubarb stalks can be frozen for months.
- Blanch and freeze asparagus for long-term storage.
- Pickle horseradish root in vinegar for a shelf-stable condiment.
- Store Jerusalem artichokes in a cool, dark place for weeks.
- Dry walking onion bulbils for use as seasoning.
Perennial vegetables often store better than annuals. Their natural sugars and fibers help them keep longer. Use fresh harvests first, then process extras.
Frequently Asked Questions
What are the easiest perennial vegetables to grow in Pennsylvania?
Asparagus, rhubarb, and walking onions are the easiest. They need minimal care once established. They tolerate Pennsylvania’s cold winters and humid summers well.
Can I grow perennial vegetables in containers in Pennsylvania?
Yes, but choose large containers for deep-rooted plants like horseradish. Use well-draining potting mix and water regularly. Move containers to a sheltered spot in winter.
How long do perennial vegetables live in Pennsylvania gardens?
Asparagus can live 15 to 20 years. Rhubarb and horseradish last 10 to 15 years. Walking onions and Good King Henry persist indefinitely if divided regularly.
Do perennial vegetables need full sun in Pennsylvania?
Most need at least 6 hours of direct sun. Good King Henry and rhubarb tolerate partial shade. Jerusalem artichokes grow in poor soil but need full sun for best tuber production.
When is the best time to plant perennial vegetables in Pennsylvania?
Early spring, as soon as the soil can be worked, is ideal. Fall planting works for walking onions and horseradish. Avoid planting in midsummer heat to reduce stress on young plants.
Final Thoughts On Perennial Vegetables In Pennsylvania
Perennial vegetables offer a sustainable, low-maintenance way to grow food. They adapt well to Pennsylvania’s climate and soil. Start with a few plants and expand as you gain experience.
Remember to prepare your soil well and give plants time to establish. With proper care, these vegetables will reward you for years. You’ll enjoy fresh harvests from early spring through late fall.
Whether you have a large garden or a small raised bed, there’s a perennial vegetable for you. Asparagus, rhubarb, horseradish, and others are proven performers. They reduce your workload and increase your food security.
Pennsylvania’s growing conditions are perfect for these resilient plants. The cold winters provide necessary dormancy, while warm summers fuel growth. Your garden will become a self-sustaining ecosystem.
Start planning your perennial vegetable garden today. Choose a sunny spot, amend the soil, and select your favorites. You’ll be amazed at how little effort they need once established.
Happy gardening in the Keystone State. Your perennials will thrive and provide for years to come. Enjoy the journey of growing your own food naturally.