Yellow Scallop Pattypan
Cucurbita pepo 'Yellow Scallop'
These charming sunshine-yellow summer squashes look like little flying saucers with their distinctive scalloped edges and flattened shape. Incredibly productive plants begin bearing early in the season and continue producing tender, mild-flavored fruits perfect for stuffing, grilling, or eating raw. Their unique appearance and sweet, delicate taste make them a favorite at farmers markets and dinner tables alike.
Harvest
50-55d
Days to harvest
Sun
Full sun
Zones
3–11
USDA hardiness
Height
1-3 feet
Planting Timeline
Showing dates for Yellow Scallop Pattypan in USDA Zone 7
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Yellow Scallop Pattypan · Zones 3–11
Growing Details
Zone-by-Zone Planting Calendar
| Zone | Indoor Start | Transplant | Direct Sow | Harvest |
|---|---|---|---|---|
| Zone 3 | — | — | June – July | August – October |
| Zone 4 | — | — | June – July | August – October |
| Zone 5 | — | — | May – June | August – September |
| Zone 6 | — | — | May – June | July – September |
| Zone 7 | — | — | April – June | July – August |
| Zone 8 | — | — | April – May | June – August |
| Zone 9 | — | — | March – April | May – July |
| Zone 10 | — | — | February – April | May – June |
| Zone 1 | — | — | July – August | September – August |
| Zone 2 | — | — | June – August | September – September |
| Zone 11 | — | — | January – March | April – May |
| Zone 12 | — | — | January – March | April – May |
| Zone 13 | — | — | January – March | April – May |
Succession Planting
Direct sow every 14–18 days from April 1 through late June in zone 7. Each planting gives you about 3–4 weeks of heavy production before the plant starts slowing down, so staggering keeps fruit coming through July and into August. Don't push past a late-June sowing — pattypan planted after that will be setting fruit right when squash vine borers are peaking, and NC State Extension notes borers lay eggs in July. You'll lose the back half of the season to them.
If your first planting gets taken out by bacterial wilt early, a second sowing in mid-May can still deliver a full harvest before frost. Stop succession once daytime highs are consistently above 90°F — germination drops off sharply and plants struggle to set fruit in that kind of heat anyway.
Complete Growing Guide
Yellow Scallop Pattypan squashes thrive in full sun with consistently warm soil—wait until nighttime temperatures stay above 60°F before transplanting, as they're more cold-sensitive than other summer squash varieties. Their compact 1–3 foot plants need rich, well-draining soil amended with compost, and they'll produce prolifically within 50–55 days if kept consistently moist. Unlike sprawling varieties, these bush-type plants are less prone to powdery mildew due to better air circulation, though they can still succumb to squash vine borers and cucumber beetles—monitor stems closely and consider row covers early in the season. One crucial tip: harvest fruits when small and tender (2–3 inches across) to encourage continuous production; allowing larger fruits to mature signals the plant to slow fruiting. Consistent harvesting and regular watering prevent the stress that leads to premature bolting and bitter flavor development.
Light: Full sun (6 or more hours of direct sunlight a day). Soil: High Organic Matter, Loam (Silt). Soil pH: Neutral (6.0-8.0). Drainage: Good Drainage, Moist. Height: 1 ft. 0 in. - 3 ft. 0 in.. Spread: 2 ft. 0 in. - 25 ft. 0 in.. Spacing: 12 inches-3 feet. Growth rate: Rapid. Maintenance: High. Propagation: Seed. Regions: Coastal, Mountains, Piedmont.
Harvesting
Harvest Yellow Scallop Pattypans when they reach 2-3 inches across, while the skin remains bright yellow and still yields slightly to gentle pressure, ensuring peak tenderness and flavor. At this small size, the flesh is delicate and sweet, ideal for whole or halved preparations. Unlike single-harvest varieties, these prolific plants reward continuous picking—check plants every 2-3 days and remove fruits promptly when they reach optimal size, as leaving mature squashes on the vine signals the plant to slow production. Regular harvesting encourages the plant to invest energy in new flower and fruit development rather than ripening seeds, extending your harvest window well into summer and maximizing your yield from each vigorous plant.
A type of berry called a pepo that has a hard rind. Fruits may be long or round, large or small, smooth or warty– some have edible flesh and some are too hard or insipid to eat, though the seeds of all are edible. Has a harder, thicker stem compared to other species.
Color: Black, Cream/Tan, Gold/Yellow, Green, Orange, Pink, Red/Burgundy, Variegated, White. Type: Berry. Length: > 3 inches. Width: > 3 inches.
Garden value: Edible, Showy
Harvest time: Fall
Storage & Preservation
Fresh Yellow Scallop Pattypans store best in the refrigerator crisper drawer for 4-7 days, though they're at peak flavor and tenderness within 2-3 days of harvest. Their thin, tender skins make them more perishable than winter squash, so avoid storing at room temperature for more than 1-2 days.
For longer preservation, blanch whole small pattypans (2-3 inches) for 3 minutes, then freeze in airtight containers for up to 8 months—they're perfect for stuffing when thawed. Alternatively, slice larger fruits into rounds, blanch for 2 minutes, and freeze on trays before transferring to freezer bags. Pickled pattypans make excellent preserves: slice and quick-pickle in vinegar brine with dill and garlic for a tangy side dish that keeps refrigerated for several weeks.
History & Origin
The Yellow Scallop Pattypan belongs to the Cucurbita pepo species, the same lineage as zucchini and crookneck squashes, all domesticated from wild gourds in Mesoamerica thousands of years ago. The distinctive scalloped pattypan type likely emerged from deliberate selection among early summer squash varieties, though specific documentation of the yellow cultivar's origin remains sparse in horticultural records. The variety gained prominence during the mid-twentieth century through American seed catalogs, becoming established as a market garden staple. While precise breeder attribution is unclear, the Yellow Scallop represents a refinement of traditional pattypan types toward improved color, productivity, and culinary appeal, maintaining the heritage squash genetics that home gardeners and farmers have selected and preserved for generations.
Origin: North America
Advantages
- +Early 50-55 day maturity means quick harvests and extended seasonal production
- +Distinctive scalloped appearance makes them visually striking at farmers markets
- +Mild, sweet flavor works raw, grilled, stuffed, or in diverse recipes
- +Incredibly productive plants yield abundant fruits throughout the growing season
- +Easy difficulty level makes them ideal for novice and experienced gardeners
Considerations
- -Susceptible to squash bugs, cucumber beetles, and aphids requiring pest management
- -Vulnerable to powdery mildew, bacterial wilt, and mosaic virus infections
- -Delicate skin bruises easily during harvest and handling or storage
Companion Plants
Nasturtiums and marigolds are the two companions worth prioritizing alongside pattypan. Nasturtiums act as a trap crop, pulling aphids onto themselves and away from the squash — you'll see them pile onto nasturtium stems and largely leave the squash alone. French marigolds (Tagetes patula) work through a different mechanism: NC State Extension notes dense plantings suppress root-knot nematodes, which share a wide host range with cucurbits. Any bed that's had nematode trouble is a good candidate for a solid marigold block the season before you return to squash. Radishes direct-sown around the perimeter can also confuse cucumber beetles at the seedling stage, which is exactly when bacterial wilt transmission is most dangerous.
Fennel is the plant to keep at a distance — its roots release allelopathic compounds that stunt most vegetable crops, squash included. Potatoes are a worse neighbor than they look: the pest populations overlap, and a Colorado potato beetle infestation next door will find its way to your squash bed faster than you'd expect.
Plant Together
Nasturtiums
Repels squash bugs, cucumber beetles, and aphids while attracting beneficial predatory insects
Marigolds
Deters squash bugs, cucumber beetles, and nematodes with their strong scent
Radishes
Repels squash vine borers and cucumber beetles, breaks up soil for squash roots
Beans
Fix nitrogen in soil that squash can utilize, and squash leaves provide shade for bean roots
Corn
Provides vertical structure and wind protection, part of traditional Three Sisters planting
Catnip
Strongly repels squash bugs, cucumber beetles, and other common squash pests
Dill
Attracts beneficial insects like parasitic wasps that control squash pests
Oregano
Repels cucumber beetles and provides ground cover to retain soil moisture
Keep Apart
Potatoes
Compete for similar nutrients and space, may increase disease pressure in soil
Fennel
Inhibits growth of most garden plants including squash through allelopathic compounds
Brassicas
Heavy feeders that compete for nutrients, may stunt squash growth and development
Nutrition Facts
Per 100g serving. % Daily Value based on 2,000 calorie diet. Source: USDA FoodData Central (FDC #168040)
Pests & Disease Resistance
Resistance
Moderate resistance to common squash diseases
Common Pests
Squash bugs, cucumber beetles, aphids
Diseases
Powdery mildew, bacterial wilt, mosaic virus
Troubleshooting Yellow Scallop Pattypan
What you'll see, why it happens, and what to do about it.
Plants wilting suddenly and collapsing, even when soil is moist — often with a slimy bacterial ooze when you cut a stem
Likely Causes
- Bacterial wilt (Erwinia tracheiphila), transmitted by striped or spotted cucumber beetles feeding on leaves
- High cucumber beetle pressure early in the season before the plant is established
What to Do
- 1.Pull and bag wilted plants immediately — there is no cure once bacterial wilt sets in
- 2.Cover transplants or direct-sown seedlings with row cover until flowering starts, then remove for pollination
- 3.NC State Extension notes that early planting helps the crop get ahead of peak beetle pressure — get seeds in the ground once nighttime lows stay above 50°F, and rotate beds away from cucurbits for at least 3 years
White powdery coating on upper leaf surfaces, usually appearing mid-summer after fruit set begins
Likely Causes
- Powdery mildew (Podosphaera xanthii or Erysiphe cichoracearum) — a fungal disease that spreads by airborne spores and thrives in warm, dry days with humid nights
- Crowded spacing or low-lying beds with poor airflow
What to Do
- 1.Remove the worst-affected leaves and dispose of them in the trash, not the compost
- 2.Apply diluted neem oil (2 tbsp per gallon of water) every 7–10 days once you first spot it — waiting longer makes it harder to slow down
- 3.Next season, give plants their full 36–48 inches of spacing and avoid overhead irrigation in the evening
Frequently Asked Questions
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Growing Guides from Wind River Greens
Where to Buy Seeds
Sources & References
External authority sources used in compiling this guide.
See the Methodology page for how this data is sourced, what's AI-assisted, and known limitations.
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