Winter Squash Seeds,
Sibley or Pikes Peak

Start seeds indoors 3-4 weeks before the last frost, or direct sow outdoors once the soil has warmed to at least 70 F, usually in late spring. The Sibley squash needs a long growing season of 110 days, so it's best suited for areas with warm summers. Check local frost dates to determine the best time to plant for you.

• Plant in spring or early summer; harvest in fall before a hard frost.
• You can direct seed or start squash indoors; just be extra careful not to let plants become pot bound! All cucurbits will not tolerate outgrowing their pots; it will stunt their growth.
• Sow seeds or put out transplants about one to two weeks after the chance of frost has passed, as these plants absolutely cannot handle frost.
• Sow seeds ½ to 1 inch deep.
• Germination temperature is 70-95 F.
• Seeds germinate in 5-10 days.

• Squash plants like rich, well-drained soil and plenty of sun.
• If you do not have a lot of space in your garden, be sure to choose bush type squash varieties; otherwise you will have a trailing vine that may crowd other plants. There is a major bonus to growing vine types: The squash vine borer has a much more difficult time killing them than bush types.
• Sow seeds one foot apart in rows, and rows should be six to 10 feet apart if vining types are grown.
• When plants get to be about 6 inches tall, you can thin to two to three feet apart in the rows.
• It can be very tricky to weed around mature plants without disturbing the delicate vines, so weed often when plants are young. As they get older, their massive leaves will help reduce weeds.
• Winter squash are left on the vine to harden and have a long storage life. Harvest summer squash frequently.

PESTS/SPECIAL CONSIDERATIONS

• Squash beetles and vine borers are the primary pests. We take a multi-step approach to combating the issue. Aside from crop rotation, we delay planting until after the squash bug season has peaked in late June, and we spray with pyrethrum and neem oil.

• There are four different species of squash: Cucurbita maxima, C. pepo, C. moschata, and C. mixta. They will not cross pollinate with each other, so it is possible to grow one of each species for seed saving without worrying about cross pollination.
• If you are planning to grow several varieties of more than one species, you can bag the blossoms and hand pollinate to avoid crossing.
• Whether it is a summer or winter squash, you must let the fruit completely mature before extracting the seeds, and cure for at least two weeks.
• Scoop the seeds, place them in a bucket, and add just enough water to cover. Let sit at room temperature to ferment for two days before rinsing off the pulp.
• Lay seeds out to dry on newspaper or paper plates.
• Stored in a cool, dry place, seeds will remain viable for up to four years.