How to Grow Pattypan Squash
Pattypan Squash
Cucurbita pepo var. pattypan
vegetablePattypan squash is a summer squash with distinctive flattened, scalloped edges resembling a flying saucer or UFO. It produces tender, mild-flavored flesh and is typically harvested at 2-4 inches in diameter when the skin is still tender. The plant is a sprawling bush variety that produces prolifically throughout the growing season.
Looking for a specific variety?
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-11; grows best in warm-season climates (zones 5-10)
Sign up to see your zone highlighted.
Growth Stages
Seedling
1-2 weeksCotyledons emerge, followed by true leaves. Plant develops a strong root system and primary leaf structure.
Keep soil consistently moist but not waterlogged. Provide bright light and maintain temperatures 70-85°F. Thin to strongest seedling if starting multiple seeds per cell.
Vegetative Growth
2-3 weeksPlant develops multiple stems and large, deeply lobed leaves. Bush spreads outward, reaching 24-36 inches in diameter.
Provide consistent moisture and weekly fertilization with balanced fertilizer or dilute fish emulsion. Mulch around base to retain moisture and suppress weeds. Maintain adequate spacing for air circulation.
Flowering
2-3 weeksLarge yellow flowers appear on the ends of stems. Male flowers appear first, followed by female flowers with visible small fruit at the base.
Ensure adequate pollinator access (bees). Reduce nitrogen fertilization to encourage fruiting over leaf growth. Continue consistent watering. Hand-pollinate if pollinator activity is low using a small brush.
Fruit Development
2-3 weeksFruit swells rapidly from pollinated female flowers, developing the characteristic flat, scalloped shape. Skin begins light green or pale yellow.
Maintain consistent watering—irregular moisture can cause blossom end rot and fruit cracking. Continue feeding with balanced or fruiting fertilizer every 2 weeks. Provide support for heavy fruit if needed.
Harvest Ready
Continuous, 4-6 weeksFruit reaches 2-4 inches in diameter with tender, thin skin (not fully mature). Color is pale to medium green or yellow depending on variety.
Begin harvesting when fruit reaches desired size. Frequent harvesting encourages continued production. Check plants 2-3 times weekly during peak season.
Common Pests
-
Hand-pick nymphs and adults early morning. Use row covers at planting. Apply neem oil or insecticidal soap. Plant trap crops like blue hubbard squash nearby.
-
Wrap base of stems with aluminum foil or row covers. Inject Bt (Bacillus thuringiensis) into stems. Remove affected vines. Plant later in season to avoid peak borer activity.
-
Ensure good air circulation through proper spacing. Apply sulfur dust or potassium bicarbonate spray at first sign. Remove infected leaves. Avoid overhead watering.
-
Use row covers until flowering. Hand-pick beetles. Apply neem oil or spinosad. Set up yellow sticky traps.
-
Increase humidity with regular misting. Spray with water to dislodge. Apply neem oil or insecticidal soap if infestation is severe.
Uses
Fresh cooking and sautéing
CulinaryPattypan squash has mild, delicate flavor and tender flesh that works well sliced and sautéed in butter or olive oil, grilled, roasted, or steamed. The unique shape makes it attractive for presentation and can be stuffed whole for elegant dishes. [source]
Raw salads
CulinaryYoung, tender pattypan squash can be thinly sliced raw and added to salads with vinaigrettes. The delicate texture and mild flavor pair well with other fresh vegetables and herbs. [source]
Pickling and preservation
CulinarySmall pattypan squash can be pickled whole or sliced for long-term storage. The firm texture holds up well to pickling brines with vinegar, spices, and herbs. [source]
Pollinator support
WildlifeThe abundant yellow flowers attract bees, butterflies, and other pollinators, making pattypan squash plants valuable for supporting beneficial insect populations in the garden. [source]
Decorative garden feature
HouseholdThe distinctive scalloped, UFO-like fruit shape adds visual interest and novelty to vegetable gardens. Immature fruit can be used in floral arrangements and summer table displays before cooking. [source]
Harvest Tips
Harvest when fruit is 2-4 inches in diameter for tender flesh and maximum flavor. Smaller fruit (2-3 inches) are often more tender and preferred. Cut fruit from vine with a sharp knife rather than twisting to avoid damage to plant. Harvest every 2-3 days during peak season to encourage continuous production. Peak harvest occurs 50-65 days after planting and continues for 4-6 weeks. Fruit stored at 50-55°F keeps for 1-2 weeks; use fresh within a few days for best quality.
Fun Facts
- 🌱 Pattypan squash is sometimes called 'flying saucer squash' due to its distinctive UFO-like appearance with scalloped edges and flattened form.
- 🌱 Unlike winter squash, pattypan is a summer squash that must be harvested when young and tender (2-4 inches) because the skin and seeds remain soft even at maturity, unlike hard-skinned winter varieties.
- 🌱 The plant produces both male and female flowers; male flowers typically appear in clusters at stem tips and provide pollen, while female flowers develop at the base where tiny fruit already forms.
Want personalized planting timelines?
Sign up to get frost dates, task lists, and more for your zone.
Get started free