From tender summer zucchini to hard-shelled winter butternut, squash seeds open the door to one of the most rewarding crops you can grow. Whether you're after fast-growing bush varieties for a small garden or sprawling vines that'll take over a trellis, there's a squash for every space and every table.
At KVITER, we take seed quality seriously. Every packet is non-GMO and heirloom, meaning you're planting seeds with a real history — varieties passed down for their flavor and reliability, not engineered in a lab. That also means you can save seeds from your own harvest year after year and count on them growing true to type.
We also test for a high germination rate on every batch, so more of what you plant actually sprouts. Less guesswork, less wasted space, and a stronger start for your garden from day one.
Summer Squash or Winter Squash
Squash comes in two families, and knowing the difference makes all the difference in the kitchen.
Summer squash — think zucchini, yellow squash, and pattypan — are picked young, while their skin is still thin and tender. That means you can eat the whole thing, seeds and all, without peeling. They cook fast, have a mild flavor, and are perfect for grilling, sautéing, or spiralizing into noodles. Look for firm, glossy skin and store them in the fridge, where they'll stay fresh for about a week.
Winter squash — like butternut, acorn, spaghetti squash, and pumpkin — are left on the vine longer, so they develop a tough outer rind and a deeper, sweeter flavor. That hard shell is actually a good thing: it means these squash keep for weeks or even months in a cool, dry spot, no fridge required. They're the ones you roast, bake into soups, or stuff for a cozy fall dinner.
Squash Seeds for Sale
Every variety below is grown from KVITER's own tested stock, so you know exactly what you're getting before the seeds even hit the soil.
- White Patty Pan — Summer squash; 50–55 days to maturity; best for grilling whole and roasting
- Yellow Patty Pan — Summer squash; 50–55 days to maturity; same uses as White, a color variety
- Straightneck Summer Squash — Summer squash; 50–55 days to maturity; best for all-purpose cooking and high yield
- Crookneck Summer Squash — Summer squash; 50–58 days to maturity; best for sautéing and classic Southern dishes
- Black Beauty Zucchini — Summer squash; 48–55 days to maturity; standard zucchini, good for baking and grilling
- Golden Zucchini — Summer squash; 50–55 days to maturity; same uses as Black Beauty, with a brighter presentation
- Round Zucchini — Summer squash; 50–55 days to maturity; best for stuffing whole, with an unusual shape
- Tromboncino — Dual-use summer/winter squash; 60–95 days to maturity; harvest young for summer eating or let mature for storage
- Waltham Butternut — Winter squash; 95–100 days to maturity; best for soups, roasting, and long storage
- Delicata — Winter squash; 90–100 days to maturity; best for roasting with the skin on, sweet flavor
- Table Queen Acorn — Winter squash; 85–95 days to maturity; best for baking whole as individual servings
- Blue Hubbard — Winter squash; 100–115 days to maturity; best for long-term storage and large-batch cooking
How to Grow Squash From Seed
Squash seed wants warm soil — below 65°F, germination slows to a crawl or stalls out completely. Direct sowing after the soil's warmed up works better than most gardeners expect; squash roots dislike disturbance, so starting indoors and transplanting isn't usually worth the trouble unless the season's genuinely short.
Pollination is the part that trips people up. Squash plants produce separate male and female flowers on the same vine, and only the female flowers — recognizable by the tiny swollen bulge behind the petals — go on to become fruit. No bee visit, no pollination, no squash, even if the plant's covered in blooms. That single detail explains most of the "why isn't my squash producing" frustration gardeners run into later in the season. It's also why KVITER recommends starting with strong, high-germination seed — a healthy stand of plants gives pollinators more flowers to work with, and you more room for error.
When to Plant Squash in Your Zone
Timing is everything with squash. These warm-season plants hate the cold, so getting the timing right means the difference between a thriving vine and a shivering seedling that never quite catches up.
The golden rule: wait until all danger of frost has passed and the soil has warmed to at least 60°F. Plant too early, and cold soil will stunt growth or rot the seeds outright.
In Zone 3–4, plant summer squash in early June and winter squash in late May. Winter types need an extra week, so prioritize Table Queen Acorn over Blue Hubbard in this zone.
In Zone 5–6, plant summer squash in late May and winter squash in mid-May. Standard timing works well for the full lineup.
In Zone 7, plant summer squash in mid-May and winter squash in early May. There's a comfortable margin for all varieties, including Blue Hubbard.
In Zone 8, plant summer squash in late April and winter squash in mid-April. Watch for early heat stress on young seedlings.
In Zone 9, plant summer squash in early-to-mid April and winter squash from late March into early April. A fall crop of summer squash is also viable if sown in late summer.
In Zone 10, plant both summer and winter squash in March. This zone has the longest growing window of any zone, allowing for multiple summer squash plantings.
Getting the Most from Small Spaces
You don't need a sprawling garden to grow great squash. With a little planning, even a balcony or small raised bed can produce a solid harvest — it's all about choosing the right variety and growing up instead of out.
Trellising vining varieties turns rambling plants into vertical growers, freeing up ground space while improving airflow and keeping fruit clean and off the soil. Good candidates include cucumber-shaped summer squash like zucchini, along with vining winter types like butternut, acorn, delicata, and spaghetti squash. Just be ready to support heavier fruit with slings made from old pantyhose or fabric strips as they grow.
Bush types, on the other hand, are bred to stay compact from the start. Varieties like bush zucchini, yellow crookneck, pattypan, and bush acorn squash are a natural fit for containers and raised beds, delivering a full-size harvest without the sprawl — just give them a large enough pot and consistent water.
Winter Squash Storage — How Long Each Variety Keeps
Not all winter squash keep the same. Some varieties last a couple of months, others can sit in your pantry well into the new year — you just need to know which is which.
The key is curing: letting freshly picked squash sit in a warm, dry spot for a week or two toughens the skin and seals in flavor, which is what makes the long storage life possible in the first place. After that, store them somewhere cool, dry, and dark — around 50–55°F is ideal, and avoid the fridge.
Blue Hubbard's thick, tough rind is exactly why it's the go-to for gardeners planning to eat squash well into winter, while Acorn types are better treated as an early-fall crop, eaten within weeks rather than banked for months.
Common Questions Growers Ask
How many squash seeds per hole?
Plant four to five seeds per hill, thinning down to the two or three strongest seedlings once true leaves show up. Cheap insurance against a seed or two failing to sprout.
Why is my squash flowering but not fruiting?
Almost always a pollination gap — male flowers typically appear first, a week or two before females show up, so early blooms with no fruit is often just normal timing, not a problem. If female flowers are present and still not setting fruit, low bee activity or extreme heat is the usual culprit; hand-pollinating with a small brush solves it in a pinch.
Can you save seeds from squash you grow?
Yes, from open-pollinated varieties like Waltham Butternut, Delicata, and the zucchini types in this lineup — all part of KVITER's heirloom selection. For that, scoop seeds from a fully mature fruit, dry them thoroughly, and store. One catch: squash varieties within the same species cross-pollinate easily, so a Black Beauty Zucchini and a Round Zucchini (both C. pepo) growing near each other won't necessarily breed true if seed is saved.
How long does winter squash actually store after harvest?
It depends heavily on the variety — anywhere from a month for Table Queen Acorn to five or six months for Blue Hubbard, assuming proper curing and a cool, dry storage spot around 50-55°F. Check periodically; any soft spots mean that squash should get eaten soon, not stored longer.
What's the real difference between summer and winter squash seed?
The seed itself looks similar across most varieties, but the plants they grow into are built for opposite outcomes — summer squash matures fast with thin, tender skin meant for quick eating, while winter squash takes twice as long or more to mature and develops a hard, storage-ready rind. The species also shifts: most summer squash on this list is Cucurbita pepo, while the winter varieties lean more toward Cucurbita moschata and Cucurbita maxima.
