Butterscotch Butternut Squash: Growing the Compact Bush Hybrid in Kansas

Not everyone has room for a butternut vine that runs 15 feet and hands you eight pounds of squash at once. Butterscotch was bred for the rest of us. It is a compact Cucurbita moschata hybrid that stays to about 3 feet, sets 1 to 2 pound fruit the size of a soda can, and won a national All-America Selections award in 2015. For a Kansas gardener with a raised bed, a few big containers, or a small backyard fighting vine borers every July, it is one of the easiest winter squash to say yes to.

What Is Butterscotch Butternut Squash?

Butterscotch F1 (Cucurbita moschata) is a small-fruited butternut with a straight neck, tan skin, and deep orange flesh that is noticeably sweeter than a full-size Waltham. Fruit runs about 6 inches long and 3 inches across, 1 to 2 pounds depending on how much room you give the plant. Crowd it to 6 square feet and it will hand you 1 pound single-serving squash; give it more and the fruit sizes up. It is an F1 hybrid, so seed saved from it will not come true, but the trade is a compact plant with built-in powdery mildew resistance, which in humid Kansas Augusts is worth more than it sounds.

Like every moschata, it carries the thick, solid stems that squash vine borers rarely defeat. That single species trait is why we keep steering Kansas growers toward this family and away from the soft-stemmed Cucurbita pepo varieties that collapse in midsummer.

Why It Fits Zone 6b Kansas

A Real Bush Habit

Most "compact" squash still throw 8 foot runners by August. Butterscotch spreads about 3 feet and stays there, which means it fits a 4 by 4 raised bed, a half whiskey barrel, or the strip along a south fence where nothing else quite works. It is also one of the few winter squash we would plant in a large container on purpose.

Vine Borer Resistance

The squash vine borer (Melittia cucurbitae) needs a soft, hollow stem to tunnel. Butterscotch's dense moschata stems are a poor target and borers rarely complete their life cycle on them. K-State's squash vine borer management guide (MF3309) lists resistant species as the first line of defense, and this variety is that advice in seed form.

Powdery Mildew Resistance

Kansas humidity brings powdery mildew to most squash patches by mid August, and on a 100 day variety that late-season leaf loss is what shrinks the harvest. Butterscotch carries genetic resistance, so the plant keeps its canopy while the fruit finishes curing on the vine. You will still see some mildew in a wet year; you will not lose the crop to it.

How to Grow It in Kansas

Starting Seeds

Direct sow after last frost once the soil holds 70 F, which in Zone 6b usually means the first half of May. Plant 1 inch deep, 2 seeds per spot, and thin to the strongest. Moschata seed sulks in cold ground, so waiting a week beats planting early. For a head start, sow indoors 3 weeks before transplant in 3 inch pots, harden off for 4 to 7 days, and set out after frost danger without disturbing the roots. Transplants shave about two weeks off the calendar: figure 85 days from transplant versus 100 from direct seed.

Spacing

Give each plant 5 to 6 square feet. In rows, that is 18 to 24 inches between plants with rows 3 feet apart. In a raised bed, one plant per 4 square foot block is comfortable. In a container, use at least 10 gallons of soil per plant and expect the smaller 1 pound fruit.

Soil and Feeding

Work 2 to 3 inches of compost into the bed and aim for pH 6.0 to 6.8. Balanced fertilizer at planting, a light nitrogen side-dress when the plant starts to spread, then a lower-nitrogen feed at first flower to push fruit rather than leaves. Mulch once the soil is warm. Compact plants dry out faster than sprawling vines, so container plantings need water most days in July.

Days to Maturity and Harvest

About 100 days from direct seed, 85 from transplant. Harvest when the skin has gone fully tan, the stem is corking and drying, and your thumbnail no longer dents the rind. Cut with 1 to 2 inches of stem and handle gently; small fruit bruises as easily as big fruit. One or two light frosts are tolerable, but bring the crop in before a hard freeze.

Curing and Storage

Cure in a warm, dry, ventilated spot for 5 to 10 days, then store at 50 to 55 F with good air circulation. Butterscotch holds about 3 months, shorter than a full-size butternut, so eat these first and let your Waltham or Long Island Cheese carry you into February.

In the Kitchen

This is the squash you do not have to plan around. Pierce the skin, microwave whole for about 12 minutes, halve it, scoop the seeds, and eat it out of the shell with butter and salt. Roasted cut side down it caramelizes at the edges and needs no sugar. The flesh is dense enough to cube for soups and curries without falling apart, and the sweetness carries a pie or quick bread on its own.

Saving Seed

Butterscotch is an F1 hybrid. Seed saved from it will grow, but the next generation splits back toward its parent lines and you will get a mix of plant sizes and fruit shapes. If seed saving is part of your plan, grow it for eating and save seed from an open-pollinated moschata like Waltham Butternut instead.

Related Growing Guides

For another single-serving moschata, read the Honeybaby butternut growing guide and the Honeynut squash growing guide. Planning a tight layout? See best pumpkin and squash varieties for small gardens and container gardening with pumpkins. When mildew shows up anyway, our powdery mildew prevention and treatment guide covers what to do.

Get the Seeds

Shop Butterscotch butternut squash seeds in 10 and 20 seed packets, F1 hybrid and non-GMO, shipped from Newton, Kansas. Browse the full Vine Borer Resistant collection for the rest of the family.