How to Grow Purple Queen Bean
Wikimedia Commons
Purple Queen Bean
Phaseolus vulgaris
vegetablePurple Queen Bean is a bush bean variety prized for its striking deep purple pods and tender, flavorful beans. It produces compact plants ideal for containers and small gardens, with beans that turn green when cooked. This variety is known for heavy yields and excellent disease resistance.
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Example Purple Queen Bean timeline · Pittsburgh, PA (Zone 6b)
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Plant Purple Queen Bean
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Purple Queen Bean
Around Jun 6≈ 50 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Purple Queen Bean dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-10; warmest production in zones 7-9
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Seedling
1-2 weeksCotyledons emerge and develop into first true leaves; plant remains low and compact
Keep soil consistently moist; provide full sun; thin to proper spacing if direct seeded
Vegetative
2-3 weeksBush forms dense foliage with multiple stems; no flowers yet; purple leaves may be visible on stems
Water regularly; avoid high-nitrogen fertilizer which promotes excess foliage over beans; mulch to conserve moisture
Flowering
1-2 weeksSmall white or pale purple flowers appear in clusters; plant reaches full height of 12-18 inches
Maintain consistent watering; do not fertilize; ensure adequate sun exposure for flower production
Pod Development
2-3 weeksFlowers fade; long, slender purple pods develop and grow to 5-7 inches; pods begin to firm up
Continue consistent watering; pick pods every 2-3 days to encourage more production; watch for pests
Harvest
3-4 weeksPods reach full size and firmness; can harvest at green snap stage or allow to mature further for shell beans
Harvest regularly to extend production; pick in morning after dew dries; handle plants gently to avoid damage
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Hand-pick beetles and eggs daily; use row covers on young plants; apply neem oil or spinosad if infestation is severe
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Spray with strong water stream; apply insecticidal soap; introduce ladybugs; use neem oil
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Increase humidity with regular misting; spray with neem oil or sulfur; ensure adequate watering
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Plant virus-resistant varieties; control aphids which spread virus; remove infected plants immediately
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Improve air circulation; avoid overhead watering; apply sulfur dust or potassium bicarbonate spray
Uses
Snap Bean Cooking
CulinaryPurple Queen beans are excellent as fresh snap beans, sautéed, steamed, or roasted. The purple color transforms to green when cooked but retains a tender, slightly sweet flavor ideal for side dishes and salads. [source]
Dry Shell Beans
CulinaryAllow pods to fully mature and dry on the plant, then shell and store the beans dry for winter use in soups, stews, and baked bean recipes. [source]
Nutritional Benefits
MedicinalPurple beans contain anthocyanins and other polyphenols with antioxidant and anti-inflammatory properties. High in plant-based protein, fiber, and essential minerals like iron and magnesium. [source]
Garden Space Efficiency
HouseholdThe compact bush growth habit and heavy yield make Purple Queen ideal for small gardens, containers, and raised beds, maximizing harvests in limited space. [source]
Nitrogen Fixation
WildlifeAs a legume, Purple Queen beans form symbiotic relationships with nitrogen-fixing bacteria, naturally enriching soil and reducing fertilizer needs for subsequent crops. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest pods when they reach 5-7 inches long and snap cleanly between fingers (snap bean stage). Harvest every 2-3 days to promote continuous production. Pick in the morning when pods are crisp. For shell beans, allow pods to mature and dry on the plant, then shell beans and store dry. Do not harvest when foliage is wet to avoid spreading disease.
Fun Facts
- 🌱 Purple Queen beans contain anthocyanin pigments (the same compounds that make blueberries blue and purple) that fade to green when heated, making them a striking visual addition to raw salads and platters.
- 🌱 All common bean varieties are New World crops domesticated in Mexico and Central/South America over 8,000 years ago, and were completely unknown to Europe, Africa, and Asia before Columbus.
- 🌱 Despite their name, purple bean pods are technically immature fruit; if left on the plant, they would eventually dry and the beans inside would be ready for storage or planting the next season.
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