Tags: Certified Organic Open Pollinated

Growing Practices: No Pesticides No Herbicides No Fungicides No Synthetic Fertilizers

Latin Name: Cucurbita moschata

Days to Maturity: 100


South Anna is a new Downy Mildew resistant butternut developed from a cross between Seminole Pumpkin and Waltham butternut. Edmund Frost made the cross in 2011 and has been working on it each year since, intensively selecting for Downy Mildew resistance, productivity, eating quality, brix, dry matter, keeping quality, and butternut shape. This is F8 seed (the eighth generation after the cross). While selection work will continue through 2019 and possibly 2020, the progress made to date is exciting. Expect 95% butternut-shaped fruits, with good productivity, Downy Mildew resistance, rich sweet flavor, and very good keeping quality. Immature fruits vary between light and dark green in color (most immature butternuts are light green). The dark green ones take longer to turn fully tan, but when they do you can be sure that they are ripe.

South Anna will avoid the crop failure that can occur in years when Downy Mildew comes early, and provide higher yields in years with average DM pressure. The healthier foliage also leads to better fruit quality, with sweeter, riper fruits of a rich tan color. When used as a late planting, South Anna grows strong until frost, allowing for later harvests that will keep better into the winter and spring.

South Anna is an Open Source Seed Initiative (OSSI) variety. OSSI is a movement to help protect seed from corporate monopolization. Read more at www.osseeds.org.

100 days. Grown at Twin Oaks Seed Farm.

Note that we will be switching to F9 seed from the 2019 seed crop on December 15th. If you want 2019 seed please make a note of it on your order, or wait until after December 15th.

Questions 12 Total

Ask a Question About South Anna Butternut - Certified Organic

  • Answer this question

    As i wrote to you in August of this year i plan to buy some of your South Anna Butternut squash seeds when you get them in. I plan to grow them in 2020 on a trellis. Will i need to use extra support like some kind of sling to hold the fruit up or will they hold themselves without breaking off the vine. I think they should hold themselves but would really appreciate your thoughts on the matter. Thanks !!! Alan Fogle

    Posted by Alan Fogle on 10/15/2019

    Answers 1

    • Yes, they will hold themselves on the vine. Make sure to use a large and sturdy trellis.

      Posted by A Seed Growers Cooperative on 10/16/2019

  • Answer this question

    This is August the 12th, 2019 and i have just found out about your South Anna Butternut Squash and want to plant some next year. I am wondering if you will have seeds for next year saved from this years crop. If so i will wait until you get the fresh ones to purchase. I am looking forward to growing these as here in Tn. We have problems with the downy mildew and the squash vine borer and squash bugs and i read in a couple of the comments that they seem to be more resistant to them than many other squashes.
    Alan Fogle

    Posted by Alan Fogle on 08/11/2019

    Answers 1

    • Thank you for your interest. Yes we are growing and selecting a new crop this year so its best to wait till about mid December before ordering seeds for 2020.

      Posted by A Seed Growers Cooperative on 08/12/2019

  • Answer this question

    Good evening. Are you planning to release the "8th year of selection" for your wonderful "South Anna Butternut"? Thank you.

    Posted by Dirk Zhang on 09/06/2018

    Answers 1

    • Yes! This years growout is looking good and we are actively continuing the selection process.

      Posted by A Seed Growers Cooperative on 09/06/2018

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    Do you know if this variety maintains the vine borer resistance of Seminole squash? I live in New Orleans where I tend to lose all my squash plants to vine borers, and Seminole is the only variety I’ve had real luck with. Thanks!

    Posted by Jacob Ingalls on 01/20/2018

    Answers 2

    • I am not sure but would really love to know. We have vine borers here in Virginia, but my understanding is that they aren't at the kind of levels you see there. They do a lot of damage to our C. pepo and C. maxima squashes, but in our experience they don't touch the C. moschatas.
      Edmund for CWSG

      Posted by A Seed Growers Cooperative on 01/21/2018

    • Hi! Greg in Austin, Texas. Vine borers are definitely a problem here in Austin but this variety is unaffected. I've watched the moths flying in the morning and they will hover over the vines, maybe touch down but immediately fly away without laying an egg. By contrast I have picked hundreds of eggs off of our zucchini plantings.

      Posted by Greg Mast on 07/17/2018

  • Answer this question

    How long are the vines? Because my garden is small, I trellis all of my vining crops. But I learned the hard way that some squash vines can grow 50 feet long - way too long to trellis!

    Posted by Debra Graff on 09/18/2017

    Answers 1

    • These have long vines. It would take a very strong trellis, such as a cattle panel arch. On the flat I use 9 foot row spacing. Don't be shy about training or cutting vines that are starting to go where you don't want them to.
      Edmund for CWSG

      Posted by A Seed Growers Cooperative on 09/19/2017

  • Answer this question

    hello, i would like to cross my tromboncino squash with your seminole x waltham (i'm looking for a long skinny squash that tastes like butternut when mature). i don't know the longevity of squash pollen, but if you'd want to send me some pollen, i would be more than happy to send you some F1 seeds back in exchange (if the pollen happens to survive the trip.) thanks!

    Posted by Carrie M on 08/29/2016

    Answers 1

    • I don't think the pollen would make the trip, though I've heard you can keep a male flower in the fridge for a couple days.
      We have some seminole pumpkin that crossed with tromboncino accidentaly, so maybe I'll look into that, starting with some attempts at self pollination (its getting late in the season) and then some taste tests of the cross. I also have a couple seminole-waltham plants with long skinny necks that I could work with (if they do decently on eating quality tests).
      Thanks for the offer and the idea. Edmund for cwsg commonwealthseeds@gmail.com

      Posted by A Seed Growers Cooperative on 09/01/2016

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    How many squash do I need to save seeds from to maintain genetic vigor in future generations? I have about 25 plants that are all doing great! Is that enough to maintain genetic diversity and strength or would it be beneficial to buy more seeds to plant next year alongside the seeds I save from this year? Thanks for such awesome seeds!

    Posted by Elisha Somerville on 09/12/2015

    Answers 1

    • Elisha,
      Since this is a variable population its ok to save seed from only your favorite few plants and to keep selecting from there each year to get (or maintain) what you want. (In a stable variety I would recommend at least 10 cucurbit plants but I think even then you can get away with less for a generation or two). Each Seminole-Waltham plant has a lot of genetic variation in it at this point. Also, each fruit has seeds whose male parents are many or all of the plants in the patch. Cucurbits do not have much inbreeding depression like corn or broccoli. In fact, many cucurbit varieties have been bred using repeated self pollinations of single plants (though many lines are tried during this process). This technique narrows the genetics much more than selecting from fruit that has multiple male parents. Some breeders believe that incorporating more plants and more genetics will yield a more resilient variety however. In any case if you're not self pollinating and you're saving seed from a few favorite plants there will be plenty of genetic diversity maintained here.

      Posted by A Seed Growers Cooperative on 09/13/2015

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    Edmund, I am getting a good harvest. Some of the baby squash are dark green with butternut shape and some are light green with Seminole pumpkin shape. They are charging through Downey mildew that has killed the Waltham butternuts. Tromboncino and Palav Kudu are also not bothered by mildew. All other cucurbits are dead!

    Posted by Marcus E. Smith on 08/25/2015

    Answers 0

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    My first planting of these failed to germinate due to cool wet April conditions, Replanted May 9 and have 2 fruits both very dark green and looking like Seminole pumpkins, Just letting you know, no butternut shapes yet.

    Posted by Marcus E. Smith on 07/14/2015

    Answers 2

    • I now think I mixed these with another squash seed. Mine have classic young butternut coloration.

      Posted by Marcus E. Smith on 07/24/2015

    • I now think I mixed these with another squash seed. Mine have classic young butternut coloration.
      Further Internet research shows pics of the same dark green color in immature Seminoles so gues I will wait and see if they ripen to butternut tan. I'll say this, they have taken over the trellis going up 6', back down and over three rows!

      Posted by Marcus E. Smith on 07/25/2015

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    Does Seminole Waltham winter squash need to to have something to climb up? And how much space between plants?

    Posted by Debra Cox on 05/10/2015

    Answers 1

    • Two to three feet between plants and nine feet between rows.... While they will climb all over the place, they can be grown on the flat.

      Posted by A Seed Growers Cooperative on 05/10/2015

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    Is this seed the F3 from an F2 selection, or is it the F4 from an F3 selection?

    Posted by Deirdre Birbeck on 04/08/2015

    Answers 1

    • This seed was selected from F2 generation plants in 2013. We planted and observed the F3 generation in 2014, and entered it in our winter squash variety trial. We have F4 seeds currently (selected from the F3 generation) but not enough to sell. Next year we should have F5 seed for sale (in bulk as well as packet sizes).
      Edmund for CWSG

      Posted by A Seed Growers Cooperative on 04/08/2015

  • Answer this question

    Do you have any more of this in stock? I want to order but can't because there isn't any in stock...


    Posted by luke Callahan on 02/20/2015

    Answers 1

    • Yes! I've updated the amounts.

      Posted by A Seed Growers Cooperative on 02/20/2015


Shipping Policies

We will do our best to ship out our orders within 2 business days; however, this changes to approximately 5 business days if you order seed from August through October as we are in the midst of harvest season. We ship USPS.

Return & Refund Policy

Refunds are on a case-by-case basis. Please contact us with your concerns and we will be happy to be of service.

South Anna Butternut - Certified Organic

Unit SizePriceDescription
3 Grams $3.50 approx. 20 seeds
1/2 Ounce $11.50 approx. 120 seeds
1 Ounce $18.00 approx. 240 seeds
1/4 Pound $50.00 approx. 960 seeds
1 Pound $150.00 approx. 3800 seeds