F1 Spinach

Spinach

40d to harvest

Unfurl tender, flat leaves with a lush, velvety sheen and a fresh, spinach-sweet flavor that feels vibrant straight from the garden. F1 Spinach forms an even, compact rosette of broad, smooth foliage—ideal for quick harvest at about 40 days—delivering a satisfying, crisp-tender texture that holds its character beautifully. Grow it for standout salads and bright sauté-style dishes, as well as silky purées and savory sauces where its gentle sweetness shines.

Crop Dates

Growing note: In frost-free Zone 10b, grow this cool-season crop during the cooler dry season (October–February).

Milestone	Date
Start Indoors	—
Climate	Frost-Free Climate
Transplant / Sow Outdoors	Oct 1st
Harvest Begins	Nov 10th
Harvest Ends	Feb 28th

Crop Details

Trait	Value
Days to Maturity	40
Sun Requirements	Part Sun
Growth Habit	Rosette
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	45
Min Soil Temp (°F)	40
Min Night Temp (°F)	30
Harden Off (days)	Not Required

Frequently Asked Questions

What pest or disease most commonly affects Spinacia oleracea (F1 spinach), and how can I treat it at home?

Spinach commonly suffers from downy mildew (often favored by cool, damp weather), showing yellow patches on leaves with a gray-purple growth on the underside. Remove and discard infected leaves right away, improve airflow, and avoid wetting foliage when watering. If you’re seeing active mildew, switch to a preventive protectant labeled for spinach (follow the label rate and reapply as directed).

How often should I water F1 spinach (Spinacia oleracea) during active growth to keep soil moisture right?

During the main growing phase, keep the top 1 inch of soil consistently evenly moist—spinach roots dry out quickly and stress can reduce leaf size. In typical cool weather, this is often about 1–2 times per week, but water whenever the soil surface begins to dry, then water thoroughly. Avoid soggy beds; good drainage is important to reduce mildew risk.

How do I tell when F1 spinach (Spinacia oleracea) is ready to harvest?

Harvest when leaves are tender and fully expanded but before they start getting tough or forming a strong central stem. For most F1 spinach, this is around 40 days from sowing (varies by temperature), and you can start picking at the first healthy leaf clusters rather than waiting for maturity of the whole row. Use scissors to cut the outer leaves or the whole plant, leaving the crown if you want potential for regrowth (when bolting hasn’t started).