Cube of Butter Summer Squash Seeds

This packet sows up to 4 mounds.
4.34375 out of 5 stars
(32 reviews)
Availability: In Stock
A winner in our company taste test, this bright and sunny, butter-yellow squash has a melt-in-your-mouth butter flavor raw or cooked. Plants are very productive for a continuous harvest. Pick squash at any size from small to large, and the fruit still has all of its tempting qualities. Easy to harvest because plants are open and have fewer spines than other varieties. Disease resistant to zucchini yellow mosaic virus, downy mildew, and podi virus.
$2.99 12 seeds

Botanical Name: Cucurbita pepo (hybrid)

Days to Maturity: 50 days

Family: Cucurbitaceae

Native: North America

Hardiness: Frost-sensitive annual

Plant Dimensions: Compact vines form a 2' tall by 3'–4' bush type plant.

Variety Information: 6"–8" long, cylindrical fruits with lemon-yellow skin, and creamy white interior. 'Cube of Butter' plants are tolerant to zucchini yellow mosaic virus, downy mildew, and podi virus.

Type: Bush

Attributes: Disease Resistant, Good for Containers

When to Sow Outside: RECOMMENDED. 1 to 2 weeks after your average last frost date, and when soil temperature is 70°–85°F.

When to Start Inside: Not recommended except in very short growing seasons, 2 to 4 weeks before transplanting. Roots are sensitive to disturbance; sow in biodegradable pots that can be planted directly into the ground. Transplant when soil temperature is at least 60°F.

Days to Emerge: 5–10 days

Seed Depth: ½"–1"

Seed Spacing: 2–3 seeds per mound

Row Spacing: 3'–4'

Thinning: When 3 leaves, thin to 1 plant per mound

Harvesting: Harvest frequently to increase yield; squash seem to get monstrous overnight. While edible at almost any size, seeds are less developed in young fruit, therefore more tender. Using a knife or clippers, cut squash off including some of the stem. By including stem, the fruit is sealed and less likely to mold or dry out. Harvesting Blossoms: Look for male, non-fruit producing flowers that have long stems and harvest just before use (female flowers have a swollen mini-squash at the base of the flower and are on shorter stems).

Write a Review

Cube of Butter Summer Squash Seeds Reviews

32 reviews

Nothing can compare

5 out of 5 stars Jul 23, 2018
This variety of squash was not only easy to grow, but is hands down the most delicious summer squash I've ever eaten. I will never grow any other!
Maggie Mieske from MI
Owner Response: Maggie, We agree! 'Cube of Butter' won our company taste tests! Thank you so much for taking time to let us know!

Amazing squash!

5 out of 5 stars Nov 26, 2018
Cube of Butter is a delicious squash that outperformed all other squash I have grown. This yellow variety was a nice addition to the garden and was more resistant to powdery mildew than Black beauty. It was the first and last to perform. I have a small space garden and probably planted two of these too close together but they roam so they moved to where they could get the best light. The yields are incredible, but I did notice the cucumber beetles really liked these and I didn't even grow cucumbers!
Val from PA


5 out of 5 stars Jul 22, 2019
Excellent tasting summer squash, strong healthy plants, very productive
Martha Cochran from WV

Buttery butter squash

5 out of 5 stars Jul 30, 2019
Delish! Produces many buttery flavored squash.
anne mele from CT


5 out of 5 stars Jul 31, 2019
I have two plants that are gigantic and have been producing lovely. We have harvested at varying sizes and all have been good, including in muffins. The plants have developed powdery mildew, however, so we'll see how long they last. Overall, happy with this squash.
Jenny Dreaden from KY
Owner Response: Hi Jenny, Thank you for your feedback. Powdery mildew is a very common issue for squash. Our article Squash: Pests and Diseases may be helpful in applying some organic solutions to the pesky mildew. You will also find it linked in the "Learn More" section of the product page. https://www.botanicalinterests.com/product/Squash-Pests-and-Diseases

Best We've Ever Grown!

5 out of 5 stars May 1, 2020
Just harvested our 8th squash from our four Cube of Butters, and they are the most delicious thing we've ever grown! They grew very quickly, and have lots of fruit still to come.
Julie Gransee from AZ

Cube of goodness!

5 out of 5 stars May 13, 2020
This is the absolute best summer squash I've ever eaten! It's beautiful, produces abundantly, and it's ridiculously easy to grow. Please don't get me started about how gorgeous the skin is on these, they're almost too pretty to eat. I can't say enough good things about these squash, my whole family is hooked!
Amanda Talley from TX

best summer squash

5 out of 5 stars Jul 24, 2020
growing great and extremely productive
lori bigi from PA

Cube of Butter Squash

4 out of 5 stars Jul 31, 2020
This squash was delicious! The plants grew well, and the fruits they produced were blemish-free. The texture and flavor were great. Based on positive first growing experience I've ordered two more packets of these seeds to grow again! I was disappointed that I didn't get more fruits. One of the plants didn't give me any, and the other put out lots of female flowers but only a few made it through to fertilization and harvest. I don't have a lot of experience growing squash, so it could have been gardener error or just a bad year in my area.
Jodi Callahan from VA
Owner Response: Hi Jodi, Pollination has become an increased issue as our pollinator friends are having a hard time. Hand-pollinating is a good solution. You may want to check out the article on hand pollinating in the learn more tab of this product page.

Cube of Butter Summer Squash

5 out of 5 stars Aug 23, 2020
I have been planting this squash 3 years now, was always amazed on the taste and the yield. This year did not disappoint once again!! 5 summer squash plants, yield 80 squash so far and still going! Amazing!! I have turn-on so many of my friends to this squash, they all say the same!
Michael Fontaine from VT

Wow, Incredible!

5 out of 5 stars Sep 6, 2020
We are super impressed with 'Cube of Butter.' It was our first summer squash to produce this year, and the texture is amazing, even when the squash get big. And they are so productive - this variety just keeps giving and giving! We did have something interesting happen though and are curious about this. We planted two mounds. One mound is super productive, and the squash are pure yellow, as expected. The other mound is less productive and the squash are, instead of being pure yellow, banded with green at the blossom end and stem end. I'm guessing these are some unexpected genes expressing themselves? We love the way they look. They strongly resemble the variety called 'Zephyr.' In any case, 'Cube of Butter' is going to be one of our yearly garden staples!
Kristina from UT

Great seeds!

5 out of 5 stars Sep 23, 2020
All seeds sprouted! Yummy small squash!
Karen Schultz from CO


5 out of 5 stars Oct 3, 2020
Best yellow squash I have ever eaten hands down. Prolific grower that yielded a lot of fruit in a season where a lot of other things didn't do well. I will never buy crookneck again.
Aimee Kurtzhalts from MA

Great flavor!

5 out of 5 stars Oct 21, 2020
These germinated well, and grew well. The flavor is delicious! Very buttery. My friends and neighbors who tasted them loved them. These plants did pretty well in spite of a terrible drought throughout the growing season.
Stephanie Donaldson from ME

Cube of butter squash

5 out of 5 stars Oct 23, 2020
Delicious squash. Even in my short growing season it did well.
Judy Sullens from WA

Unstable hybrid - did not produce squash as it should

2 out of 5 stars Dec 2, 2020
This year I purchased the "Cube of Butter" squash botanical interest seeds. Of the two plants I grew, one was highly unstable and not the intended hybrid. It seems to be displaying fruit characteristics of each parent - the yellow along with what looks like a green striped squash (like mexican squash). I just wanted to alert that this purchased packet did not include stable seeds and was a bit disappointing since it is a hybrid I specifically purchased based on what it was said to look like. 12 seeds in a packet with only some stable is an unfortunate discovery. As the plant continued to grow, the fruit shifted to completely green. And just to note, I am ensuring it is being pollinated by the stable cube of butter pollen and this isnt a cross pollination issue. In fact, you the mutation at the very start of the fruit on the female flowers indicating it is the plant itself. I would supply a photo if I could, and I emailed customer service months ago with no response so I am writing it here as there seems to be monitoring of non-positive reviews. I was hoping to get a replacement from a different lot number that would ensure the correct plant is grown. Due to space, I can only grow a few plants and it is too much of a gamble to use these existing seeds to possible get all mutants. For reference, lot # 28011 packed for 2020, purchased at Armstrong Nursery in San Diego.
Heather Willens from CA
Owner Response: Hi Heather, Thank you for taking the time to share this information. We sincerely apologize that we didn't get back to you. We recently had an email issue and communications from customers were lost. We usually respond to customers within one business day. A customer agent will be contacting you to help.

Aptly Named

4 out of 5 stars Jan 6, 2021
These summer squash were so buttery, just like the name suggests! Very prolific producers and HUGE leaves from the very beginning. Did have some younger squash start to rot while on the plant, not completely sure why though. The plants produced into the cooler season, which was nice!
Julia Sovcik from IL
Owner Response: Hi Julia, When small fruit fails to form, shrivels, and rots it is a sign of incomplete pollination. Planting flowering plants to attract bees to the area or hand-pollinating are good solutions. It sounds like the bees found your plants a bit after they began flowering though.

Love cube of butter squash

5 out of 5 stars Jan 16, 2021
Hands down the best summer squash variety we have grown. Flavorful and high yielding. Highly recommend!
Jill from CT

Cube of Butter Squash Recipes

5 out of 5 stars Jul 21, 2021
Does anyone have a recipe they would like to share for this type of squash?
Maria from TX

summer squash

1 out of 5 stars Jul 25, 2021
never did produce squash.
Stacey from TN
Owner Response: Hi Stacey, I wanted to reply and offer some assistance. Pollination issues due to a reduction in native pollinators is a frequent issue now, unfortunately. European honey bees are not very focused and do not pollinate squash as well as native squash bees. Luckily, hand pollinating is quite easy. You can find instructions under the "learn more" tab on this product page. Once a seed germinates performance is dependant upon environmental issues. We are always here to help troubleshoot these issues, please don't hesitate to contact us for help with growing issues.


3 out of 5 stars Jul 31, 2021
I'm a bit disappointed in the flavor of this variety. I know it's described as "cube of butter" and other reviewers say it has great flavor, but the ones I've harvested so far have almost no flavor. Maybe I'm doing something wrong. I'm hoping the flavor improves later in the season. Apart from the flavor, this squash grows huge leaves and the fruit is taking a long time to mature. In the time is taken to harvest three of these, I've harvested at least ten yellow squash from another variety. I wonder if it's partly because this variety set a lot of fruit simultaneously, where my other squash only set 1-2 at a time.
Carl from MO


2 out of 5 stars Aug 18, 2021
I was very excited about this variety based on the description and reviews. However my squash was light yellow with a greenish tinge on the blossom end. Flavor was bland. The female squash blossoms also opened and fell off in half a day! Only a few squash were produced from two plants. The seeds were from a 2020 packet, lot 28011. I bought another packet (2021) and will give this variety one more try. Very disappointing though on the experience, especially since I always seek out this company along with 2 others because of their reputation for quality seeds.
Louise from TX
Owner Response: Hi Louise, The issue you described regarding the flower falling off is a classic sign of poor pollination, not an issue specific to this variety. You can find hand-pollination information in the article linked on the "learn more" tab of this product page.

Great producer

5 out of 5 stars Sep 27, 2021
We had a tough summer, but this plant was an early and great producer. I did two plantings to prepare for the SVB. The vine spread further than I thought it would as a bush variety so I trained it into a tomato cage next planting.
Janis from NH

Cube of Butter

5 out of 5 stars Oct 30, 2021
Loves these. Love having enough to share with friends and family. They are a very popular item in my "circle". (Would give it a rating of '6' If possible.)
Deb from NY

Best yellow summer squashes

5 out of 5 stars Nov 9, 2021
I really loved these squashes this year. They have a great flavor and consistency that made them my new favorite summer squash. They were super prolific and I almost got sick of them I got so many out of 2 plants. Can't wait to grow them next year!
Geilesha from IA

Like butter

4 out of 5 stars Nov 11, 2021
We planted 3 hills of these beauties. We had soooo many squash! They produced early and continuously until our first frost in September. Even after that they tried! Very tender and delicious.
Lynn from CO
Owner Response: This was a taste-test favorite here at BI too. Thanks so much for sharing your experience!

New Favorite!

5 out of 5 stars Nov 12, 2021
So productive, perfect when small, grilled, sauteed and raw!! Will definitely grow again
Laura from WA
Owner Response: Thanks so much for sharing your experience!

The best squash

5 out of 5 stars Nov 13, 2021
This is the best squash I have ever eaten. As long as I have seeds for it I will always grow it. Produced very well. The squash has great flavor and texture. It survived through bug damage. All around great.
Bethany from NC

Best squash

5 out of 5 stars Nov 13, 2021
A great tasting and prolific squash in my coastal sandy soil.
Kenneth from NC

Cube o'Butter

5 out of 5 stars Nov 18, 2021
This will always be on my summer squash list. First to put out fruit, produces all season. Excellent flavor and texture, pretty color. More resistant to striped cucumber beetle.
Mary from CO

Cube of Butter Summer Squash

2 out of 5 stars Nov 19, 2021
Disappointing yield! Only got 2 squash off 2 plants. Gave some seeds to relative in the Saint Louis area who also had poor results. Had hoped this would be as good as Burpee's Butter Stick.
Annette from WI
Owner Response: Hi Annette, Thank you for sharing your feedback. Yield is an issue of pollination in most cases, not an issue with the cultivar or seed. You can read more about the issue and how to mitigate it in the "learn more" tab on this product page.

No flavor

2 out of 5 stars Nov 27, 2021
Grew ok but no flavor.
Sidney from CO
Owner Response: Hi Sidney, We are sorry you didn't like this squash. A quick tip, excess water can dilute flavor in many vegetables.

You May Also Like