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Squash, Winter, Waltham Butternut

Short Description

Delicious All-America Selections winning butternut.

Full Description

Fall and winter, this is a delicious butternut with improved fruit uniformity and increased yields. Interior is solid and dry. Pick young and use like summer squash or let mature to 6 lbs. Excellent for storing. Ready about 85 days after sowing.
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Order: 1 Pkt. (50 seeds)
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Product properties

Type Some flowers and vegetables fall into subcategories that may define how they grow (such as pole or bush), what they are used for (such as slicing tomatoes or shelling peas), flower type, or other designations that will help you select the type of a class of plant that you are looking for.

Winter Butternut

Days To Maturity The average number of days from when the plant is actively growing in the garden to the expected time of harvest.

85 days

Fruit Size The average size of the fruit produced by this product.

12-15 inches

Sun The amount of sunlight this product needs daily in order to perform well in the garden. Full sun means 6 hours of direct sun per day; partial sun means 2-4 hours of direct sun per day; shade means little or no direct sun.

Full Sun

Spread The width of the plant at maturity.

48-60 inches

Height The typical height of this product at maturity.

10-12 inches

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  • Squash

    Start Indoors Start Indoors Starting seeds indoors is called Indoor Sow or Indirect Sow and these dates are when to sow seeds indoors in the spring or summer
    Transplant Transplant When to transplant bulbs or roots in the garden for spring
    Start Outdoors Start Outdoors Starting seeds outdoors is called Outdoor Sow or Direct Sow and these dates are when to sow seeds outdoors in the spring or summer
    Start Indoors Fall Start Indoors Fall Starting seeds indoors in the fall called Indoor Sow or Indirect Sow and these dates are when to sow seeds outdoors in the fall
    Transplant Fall Transplant Fall Transplant Fall-When to transplant bulbs or roots in the garden for fall
    Start Outdoors Fall Start Outdoors Fall Starting seeds outdoors in the fall is called Outdoor Sow or Direct Sow and these dates are when to sow seeds outdoors in the fall
    First Date: May-16 - Last Date: Jul-11

How to Sow

  • Sow seeds directly in the garden in fertile, warm soil in full sun after danger of frost has passed.
  • Be sure to choose an area when you did not plant squash or related crops within 2 years.
  • Sow 1-2 seeds about 36 inches apart. Cover with 1 inch of fine soil.
  • Firm lightly and keep evenly moist.
  • Seedlings emerge in 10-14 days.
  • Thin to one plant when seedlings have two sets of leaves.

How to Grow

  • Keep weeds under control during the growing season. Weeds compete with plants for water, space and nutrients, so control them by either cultivating often or use a mulch to prevent their seeds from germinating. 
  • Squash plants have a shallow root system, mulches help retain soil moisture and maintain even soil temperatures.
  • Keep plants well-watered during the growing season, especially during dry spells. Plants need about 1-2 inches of rain per week during the growing season. Use a rain gauge to check to see if you need to add water. It's best to water with a drip or trickle system that delivers water at low pressure at the soil level. If you water with overhead sprinklers, water early in the day so the foliage has time to dry off before evening, to minimize disease problems. Keep the soil moist but not saturated.
  • Squash plants have both male and female flowers on the same plant. Male flowers will open first and the female flowers will open later.
  • Monitor for pests and diseases. Check with your local Cooperative Extension Service for pest controls recommended for your area.
  • Attract bee pollinators by planting daisies such as sunflowers, cosmos, zinnias and coneflower, and mints such as beebalm, sage, oregano and lavender. More bees mean more chances flowers will be pollinated and develop into fruits. Border squash plots with rows of beans, herbs, peppers and tomatoes.

Harvest Summer Squash & Preserving

  • Harvest when fruits are small and the skin is shiny. Harvest often. To keep summer squash producing pick all fruit at this stage. If fruit is allowed to mature the plant may stop producing.
  • To pick summer squash give the fruit a gentle twist until it snaps off.
  • Store summer squash in plastic bags in the refrigerator for up to a week.
  • Male squash blossoms are also delicious and sweet, try dipping in batter and frying.

Harvest Winter Squash & Preserving

  • Wait to until the fruit has matured to harvest.
  • Fruit will have a dull skin that is too hard to pierce with your thumbnail.
  • To harvest, cut fruit from the vine with shears leaving a 2- 3 inch stem on each squash.
  • Allow winter squash to cure in the sun for a week to harden skin.
  • Store winter squash in a cool dry place.
Winter Butternut
Days To Maturity
85 days
Fruit Size
12-15 inches
Full Sun
48-60 inches
10-12 inches
Sow Method
Direct Sow
Planting Time
Spring, Summer
Sow Time
After Last Frost
36 inches
Squash, Winter, Waltham Butternut is rated 4.1 out of 5 by 15.
Rated 5 out of 5 by from Terrific Producer I purchased Waltham Butternut seeds for the 2018 season and couldn't be happier. Stout and healthy vines with good squash production. We harvested over 50 nice squash from 15 hills that will provide a nice winter of roasted squash and soups. I have grown this squash for over 20 years with excellent results. Low maintenance, good disease resistance, and tolerant of a large range of weather conditions.
Date published: 2018-12-18
Rated 5 out of 5 by from Performs great in hot California Central Valley First year growing the Waltham Butternut. Took a while to get going. A few didn’t make it, but we planted extra and the squash are 7 inches long mid-August with plenty of time left to get bigger in our climate. They blanket the ground with their beautiful resilient leaves—a nice expanse of green since we’ve removed all grass.
Date published: 2018-08-18
Rated 1 out of 5 by from I do think the sent pure butternut seeds. I planted these seeds. I have something fruiting. It looks like a butternut spaghetti squash cross. The picture makes them look green but they are butternut colored. They are shaped like spaghetti squash. Will they “Bell” as they grow?
Date published: 2018-07-20
Rated 5 out of 5 by from Worked great for us Can't go wrong with this tried-and-true butternut. Because of its resistance to squash bugs, it is the only squash we can grow here. Great flavor, perfectly good output, very healthy plants and fruit. We have one of the shortest growing seasons, so I know what other reviewers are talking about. A tip: you just have to plant early and keep on planting until finally there is no late freeze. Squash that are still green when the early freezes come can be cooked just like summer squash and are delicious that way. All the ripe squashes should be picked before the first frost and hardened off in the home so they can last for months.
Date published: 2018-01-23
Rated 1 out of 5 by from Very Poor Turn Out From the Seeds Puchased I would not buy the Waltham Butternut Squash seed again. We planted a hill twice and neither time the squash did not come up. I was very disappointed. Was looking forward to the great taste of Butternut squash.
Date published: 2017-07-17
Rated 4 out of 5 by from Great for vertical gardening I grew these from seed. Great germination and very healthy vigorous plants. SincY garden is only 4 X 20 I do a good deal.of vertical gardening. While they do well on a trellis, you have to secure them. They do not secure themselves like cucumbers would. However unlike watermelons, you do NOT need to support the fruit. These plants vine like crazy and I made sure to keep only 4 main vines or else it would have taken over the garden. One plant produced 7 squashes to maturity. One squash is about 14 inches long while a second is only 8 inches long but VERY fat. The other squashes are smaller but still very nice looking. I am leaving them on the vine until the completly dries up to cure for storage. I've grown these before; sweet flesh and beautiful orange color!
Date published: 2016-09-09
Rated 5 out of 5 by from wonderful we got so much squash we almost did not know what to do with it. Great taste
Date published: 2015-04-05
Rated 5 out of 5 by from Patience Rewards Yes, the Waltham does seem to take forever but hang in there - it's worth it in the end. Two other things you should know from my experience: 1-you will be duped into thinking you're getting loads of squash because of all the flowers that appear, but only a few of those will actually result in 'bearing veggie'; and 2-the vines roam like a nomad - I had one find its way into and 3 ft up a cucumber trellis several feet away from the base, so give yourself plenty of room and keep steering the vines into desired confines. As far as harvesting goes, I read that you're supposed to wait until the stem (where it enters the squash) gets woody (looks drier and more brown than green) and that means you're looking at upwards of five months (at least here in NY) before you can start reaping what you sowed. The good thing is that brings you to the cusp of soup season. We've roasted and souped a few so far and they've been great.
Date published: 2014-11-09
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