By Nik Crawley, founder of GardenTrack · Updated July 26, 2026
✓ In your garden
Sunburst is the little yellow flying saucer of the summer garden — a bright-gold pattypan with scalloped edges and a genuine 1985 All-America Selections title. On a compact bush it bears early and heavily, and picked small the flesh is buttery, nutty, and delicate enough to eat raw. The honest catch is the harvest window: the buttery quality only lasts at silver-dollar to golf-ball size, and a Sunburst can double overnight into a tough, seedy disc. It also carries the full pest load of any C. pepo squash — borer, mildew, squash bugs — with no bred-in resistance.
it's yours — saved right here, no account
A single bright-yellow pattypan / scallop squash on white — the scalloped 'flying saucer' disc form and golden color of the Sunburst type (the green blush is the blossom end, normal at tender picking size). Eyeball-verified as a yellow scallop squash. · Photo: Amada44
(CC BY-SA 4.0, via Wikimedia Commons)
· source
“A genuinely AAS-honored (1985) bush pattypan whose buttery reputation is earned only if you pick it small — let it size up past golf-ball and you get the same tough, seedy squash as any neglected zucchini.”
Days to maturity50–55 daysfrom direct seed to first harvest
Shape / sizescalloped disc; pick at 1.5–3 inbright yellow 'flying saucer' — best silver-dollar to golf-ball
Plant / speciesCucurbita pepo, compact bushcontainer-friendly; F1 hybrid, seed won't come true
Pedigree1985 AAS winnerbred by Petoseed; a modern hybrid, not an heirloom scallop
Yield & habitHeavy, compact 5/5
Bush habit plus AAS-bred productivity means a couple of plants out-produce most households through peak summer — one of the heavier-yielding pattypans, and it fits a big container.
Flavor (picked small)Buttery, nutty 4/5
At silver-dollar to golf-ball size the flesh is mild, buttery, and delicate — genuinely good raw in salads or lightly sautéed whole, needing almost no seasoning.
The tender windowVery narrow 2/5
The buttery quality only holds at 1.5–3 inches across. Miss the window by a few days at midsummer growth rates and the flesh turns seedy and the skin turns tough — and a Sunburst can double in size in 24–48 hours, so it needs checking every day or two.
Pest defenseNone bred in 1/5
A 1985 variety predates modern disease-resistance breeding, so it carries the full Cucurbita pepo load — squash vine borer, powdery mildew, squash bugs — with no genetic edge over newer bush squash.
The prettiest, most productive little squash in the bed — for the gardener who'll pick it at golf-ball size, daily.
MildButteryNuttyDelicateSlightly sweet
✓ Buttery, ornamental, wildly productive — a container star~ Pick at 1.5–3 in or it turns tough and seedy — fast✗ No pest resistance; won't store past a few days
Numbers from university growing guides. Ratings are our take, judged against all summer squash. Tap a meter to see why.
Growing basics — shared by every summer squash
Sunburst grows like any other summer squash. The full picture — how deep to plant, spacing, feeding, pests, harvest — lives on the Summer Squash page so it's maintained in one place.
Greenhouse or cover on: your start slides ~4 weeks earlier and your harvest stretches ~3 weeks later (shown striped).
Planting seeds straight in the ground only works where the season's long and warm — most gardeners start seeds indoors or buy young plants, or you'd pick your first tomato right as frost hits.
We don't have enough sourced timing for sunburst to say whether it finishes before your frost. Your local frost dates are the number to plant by.
Toughen up outside
late Apr – early May
Move plants outside
early May – early May
Typical dates for zone 6b — set your zone or ZIP above for yours.
Growing Sunburst — the things that trip people up
Pick it tiny — 1.5 to 3 inches. Sunburst's whole appeal is the tender, buttery flesh of a small fruit; a Sunburst can double in size in a day or two at peak, so check the plant every day and harvest at silver-dollar to golf-ball size while the skin still pierces with a fingernail.
Lean on the container habit. It's a compact bush, so a couple of plants in a big pot or a small bed out-produce most kitchens — you don't need a row. Plant fewer than you think.
Cover early for the borer. As a Cucurbita pepo it has no bred-in pest resistance, so float row cover over young plants until they flower, then remove it for pollination. Set your zone on the [summer squash page](/plants/squash-summer/) for your sowing dates.
From university growing guides (see Sources).
A genuine 1985 AAS pattypan
Sunburst is a hybrid yellow scallop squash bred by Petoseed and named an All-America Selections winner in 1985 — that claim checks out against AAS's own listing, and it's one of the longer-standing AAS vegetable titles still in seed catalogs today. It belongs to Cucurbita pepo, the same species as zucchini and acorn squash.
Scallop (pattypan) squash itself is an old American form, documented since colonial times, so the shape is ancient. Sunburst is not the heirloom — it's a 20th-century hybrid improvement bred for uniform bright-yellow color, high yield, and a tidy bush habit. Worth knowing if you like to save seed: as an F1 hybrid, seed saved from a Sunburst won't breed true, so it's a re-buy each year rather than a seed-saver's variety.
The flying saucer, and when to grab it
You can't mistake the shape: a bright-yellow disc with a scalloped, ruffled edge — the classic pattypan silhouette, on a bush plant compact enough for a large container. It's early and heavy-bearing, with first fruit in roughly 50–55 days and then continuous production as long as you keep it picked.
The eating quality lives in the small fruit. Pick at 1.5 to 3 inches across — silver-dollar to golf-ball — when the skin is still glossy and easily pierced with a fingernail, and the flesh is mild, buttery, and nutty enough to eat raw. That's the whole point of Sunburst, and it's a narrow target.
Pick it small — the single biggest mistake
The most common home-garden complaint about Sunburst isn't a pest or a disease — it's picking it too big. Harvest one at softball size instead of golf-ball and the tender eating quality is gone, replaced by a tough skin and seedy, watery flesh. Unlike a winter squash, it does not 'hold' on the plant; it just coarsens.
The trap is that the fruit hides. At midsummer growth rates a Sunburst can double in size within 24 to 48 hours, tucked under big leaves, so a plant checked twice a week will hand you baseball-sized discs. Check every day or two once it starts producing, treat any oversized fruit as compost or chicken feed rather than dinner, and keep picking — leaving mature fruit on the plant also tells it to slow down.
Growing Sunburst
Give it full sun (at least 6 hours) and direct-sow after the soil warms to 65–70°F, roughly two weeks after your last frost — squash is frost-tender and transplants poorly once root-bound, so direct sowing is preferred. Space bush plants 18–24 inches apart in rows 3–4 feet apart, or grow one in a 5-gallon-plus container. Water consistently at 1–1.5 inches a week, at the soil line rather than overhead to limit powdery mildew, and side-dress with a balanced (not heavily nitrogen) feed once flowering starts.
Then it's all about the harvest cadence: pick at 1.5–3 inches while the skin is glossy and fingernail-tender, checking every day or two, because yield drops off if oversized fruit is left on the vine. If early flowers form and fall without setting fruit, that's normal male-only bloom for the first week or two; if it persists, hand-pollinate in the early morning.
What goes wrong — and the fixes
Squash vine borer is the single biggest killer: the moth lays eggs at the stem base, the larvae tunnel in, and the whole plant wilts and dies seemingly overnight — often just as it starts producing. Wrap the stem base in foil or row-cover fabric from planting until flowering, scout for the tiny frass piles at the base, and if you catch it early, slit the stem, remove the larva, and mound soil over the wound to re-root. Powdery mildew is the other near-certainty — a white coating by mid-to-late season — so space for airflow, water at the soil line, and treat early with potassium bicarbonate or sulfur; it won't kill the plant but it cuts yield.
Squash bugs (gray-brown adults and bronze egg clusters on leaf undersides) cause a wilting, blackening pattern distinct from borer collapse — check weekly, crush the eggs, and hand-pick adults in the cool morning when they're sluggish. And the most common 'problem,' skin toughening and seediness, isn't a disease at all: it's an oversized harvest. Pick at golf-ball size and check every day or two.
In the kitchen
Small is the rule here too. At silver-dollar to golf-ball size, Sunburst is sweet and buttery enough to slice raw into salads or sauté whole or halved with almost no seasoning, and its scalloped shape holds a filling beautifully — hollow one at 2–3 inches and stuff it with rice, cheese, or ground meat. Grilled in halves or wedges with olive oil and herbs, or roasted alongside other summer squash, it shines.
Oversized fruit is where it falls down: a softball-plus Sunburst is seedy and watery, better shredded into baked goods (squeeze out the moisture first) or sent to the compost than served as a vegetable. And like all summer squash it doesn't cure or store — use it within a few days, or shred and freeze it for baking.
Sunburst summer squash at a glance
Sunburst Summer Squash — at a glance
Type
Patty Pan
Grows as
Tall vine (indeterminate)
Days to ripe
55 days after you plant it outside
Color
Yellow
Fruit size
Small
Extra fields from seed-catalog listings and university growing guides. Days to ripe and disease resistance shift with your climate and seed source — double-check with your local extension office before you buy.
Add Sunburst to your garden
Save it and the plant lights up — kept right here in your browser, no account needed. It's the first thing GardenTrack starts remembering for you.
Sunburst is in your garden.
Kept on this device. Want it safe if your browser clears or you switch phones? Back it up free — just your email, no password.
GardenTrack is in beta now — it'll remember every plant you add here and tell you what to do and when. One email, no spam.
Common questions about Sunburst
When do you pick Sunburst squash?
At 1.5 to 3 inches across — silver-dollar to golf-ball size — while the skin is still glossy and pierces easily with a fingernail. That's when the flesh is buttery and tender. It can double in size in a day or two at peak, hidden under the leaves, so check the plant every day or two; a Sunburst picked at softball size is tough-skinned and seedy.
Is Sunburst squash really an All-America Selections winner?
Yes — Sunburst is a genuine 1985 AAS vegetable winner, bred by Petoseed, and it's one of the longer-standing AAS titles still sold today. Unlike some catalog claims, this one checks out against AAS's own records. It's a modern F1 hybrid improvement of the old scallop (pattypan) type, not an heirloom.
Can I save seed from Sunburst squash?
Not reliably. Sunburst is an F1 hybrid, so seed saved from its fruit won't breed true — it segregates into off-types the next year. If you want to save your own scallop-squash seed, grow an open-pollinated pattypan variety instead. With Sunburst, plan to re-buy seed each season.
Why did my Sunburst plant suddenly wilt and die?
Most likely squash vine borer, the variety's biggest killer. The moth lays eggs at the stem base and the larvae tunnel in, collapsing the plant almost overnight — look for sawdust-like frass at a hole near the base. Prevent it by wrapping the stem base or using row cover until flowering; if caught early, slit the stem, remove the larva, and mound moist soil over the wound to re-root. Squash bugs cause a similar but slower wilting, so check leaf undersides for bronze egg clusters too.
Garden
