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Spineless Supreme Hybrid Zucchini F1


Spineless Supreme Zucchini provides a broad disease-resistance package, high yields and completely spineless plants for easy harvesting. Plants grow longer for extended, maximal yields. C. pepo. 45 days to maturity.

Treatment: Untreated


Be sure to check out our Summer Squash Growing Guide to learn more tips & tricks on successfully growing summer squash.

Spineless Supreme Zucchini is a hybrid, green zucchini variety with outstanding disease-resistance and completely spineless plants. Spineless plants make for easy harvesting and also prevent fruit damage during harvesting. Spineless Supreme is resistant to a wide-variety of squash diseases and viruses including powdery mildew, cucumber mosaic virus, zucchini yellow mosaic virus, watermelon mosaic virus and papaya ringspot virus.

Spineless Supreme Zucchini produces club-shaped fruits that are dark green and glossy. Fruits average 6-7" long and 1.5-2" in diameter at peak flavor. The broad disease-resistance package keeps plants healthy throughout the entire growing season for maximal yields. As a result, Spineless Supreme Zucchini can be planted succession planted 3-4 times throughout the warm growing season in most zones.

Squash may be direct seeded or transplanted, although we highly recommend direct seeding. To ensure a good stand, we recommend planting squash Seeds every 12" along the intended row. Once plants emerge, thin plants to one every 2 feet. Squash can be susceptible to plant diseases like downy mildew and powdery mildew if leaves receive excess moisture. As a result, we recommend using drip irrigation on squash to reduce plant moisture and feed plants more effectively. During periods of heavy rainfall, using a fungicide like Liquid Copper can help to alleviate disease pressure as well.

Squash are a crop that will require multiple harvests throughout the growing season. Regardless of variety, squash will have better flavor and texture when harvested on the small end of the spectrum. We recommend harvesting every 2-3 days to ensure no fruits become too large and unpalatable. When squash plants cease production, remove the plants from the garden to prevent any fungal spores from overwintering and becoming a problem in future years. Proper crop rotation is extremely important with all squash varieties to reduce disease and pest pressure.

Spineless Supreme Zucchini Planting Information

Planting Method: direct seed

When to Plant: after last frost

Planting Depth: 1/2"

Seed Spacing: 18-24"

Row Spacing: 5-6'

Days to Maturity: 45

Disease Resistance: Powdery Mildew, Cucumber Mosaic Virus, Watermelon Mosaic Virus, Zucchini Yellow Mosaic Virus, Papaya Ringspot Virus

Customer Reviews

Based on 8 reviews
Chuck Woodward

No rain in GA and the squash are producing great

Timothy Johnson

Order was filled as was ordered.

Good success with Spineless Supreme Hybrid Zucchini F1

I got about 70% germination.

Winona Kocurek

These people are great and their seeds and plants can’t be beat!

winfred harden

Not happy at all. Germination rate was terrible.

Hi Winfred! So sorry about your issues with your germination. We pride ourselves on our germination rates, please contact customer support and we can get you new seeds out or a refund! support@growhoss.com