Grey

Zucchini

Zone 5a Save Garden

🌱 45d to harvest Vine

Velvety, slate-toned zucchini—Grey delivers a cool, smoky elegance with tender, mild flavor and a pleasantly crisp bite. At about…

Crop Dates

Milestone	Date
Start Indoors	May 22nd
Last Frost	May 8th
Transplant / Sow Outdoors	Jun 5th
Harvest Begins	Jul 20th
Harvest Ends	Sep 30th

Crop Details

Trait	Value
Days to Maturity	45
Sun Requirements	Full Sun
Growth Habit	Vine
Support Needed	Trellis
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	65
Min Night Temp (°F)	55
Harden Off (days)	12

Recommended Companions

French Breakfast 2 Radish

Sango Radish

Frequently Asked Questions

How do I prevent and treat powdery mildew on Cucurbita pepo (zucchini)?

Powdery mildew often shows up on zucchini (Cucurbita pepo) as a white, powdery coating on leaves after warm days and cooler nights. Start by spacing plants for airflow and removing heavily infected leaves early to slow spread. If it’s actively expanding, spray an appropriate labeled fungicide for cucurbits and repeat on the label schedule, targeting the upper and lower leaf surfaces.

How often should I water grey zucchini (Cucurbita pepo) during the main growing period?

During flowering and fruit set, keep soil evenly moist but not soggy—water when the top 1 inch of soil starts to dry. Aim for deep watering that soaks the root zone, rather than frequent light sprinkling, and stop short of waterlogging because zucchini roots dislike constantly wet soil. In hot weather you may need watering every 2–3 days, but always adjust to your soil and rainfall so leaves don’t wilt from drought.

When is grey zucchini (Cucurbita pepo) ready to harvest?

Harvest zucchini when fruits are about 6–8 inches long and still tender, usually around 45 days from sowing depending on conditions. Check daily once they start producing—overgrown fruits become tougher and can reduce ongoing flowering. Use a sharp knife to cut the fruit from the vine, leaving a short stem so the plant can keep setting more zucchini.

Velvety, slate-toned zucchini—Grey delivers a cool, smoky elegance with tender, mild flavor and a pleasantly crisp bite. At about 45 days, the plants produce smooth, medium-length fruits with a refined, straight silhouette that stays deliciously young and never turns tough too quickly. Grow Grey for abundant, garden-fresh zucchini to showcase in summer displays and to inspire your favorite ways of serving—roasted, sautéed, or folded into sauces and pickles.

Sowing Tips

Transplant Conditions

Wait until soil reaches 65°F and nights stay above 55°F before moving outdoors. Harden off for 12 days first.

Direct Sow Preferred

Sensitive roots — does not transplant well. If starting indoors, use biodegradable pots and disturb roots as little as possible when moving outdoors.

Expert Note

For compact zucchini types, plant in a sunny block with consistent moisture and harvest frequently (immature fruit) for peak flavor and continued production.