Winter Giant

Spinach

50d to harvest

Sink your spoon into Winter Giant’s lush, deeply colored leaves—cool-weather spinach at its most velvety, with a gentle, sweet-green flavor and tender, broad blades that hold their character through the chill. Expect a satisfying, succulent texture that stays flexible rather than tough, making it a standout for bold winter harvests. Grow Winter Giant for reliable, early-to-mid season leaf production and a steady supply of greens for fresh bunches and quick sautés, as well as rich, spoonable sauces and hearty soups.

Crop Dates

Growing note: In frost-free Zone 11a, 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 20th
Harvest Ends	Feb 28th

Crop Details

Trait	Value
Days to Maturity	50
Sun Requirements	Full 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)	6

Frequently Asked Questions

What pest or disease most often hits Winter Giant crops, and how can I manage it?

Look out for aphids and slugs, which commonly damage leafy growth and can leave plants weak by mid-season. Rinse aphids off with a strong jet of water and use insecticidal soap on infested leaves; hand-pick slugs at dusk and set slug traps or iron-phosphate bait around the beds. If you see leaf spots or mildew, remove affected leaves early and keep foliage dry by watering at soil level rather than from above.

How often should I water during the main growing phase, and what soil moisture level should I aim for?

During active growth, keep the soil consistently moist but not soggy—aim for the top 1 inch to be evenly damp, then water again when it starts to dry at that depth. In full sun, this often works out to about 1 inch of water per week total (more if it’s hot and windy), split into 1–2 deeper waterings. Avoid waterlogged soil because it increases the risk of leaf and root diseases.

How do I tell when Winter Giant is ready to harvest?

Harvest at about 50 days after sowing when heads/foliage reach their expected large, firm size and the plants look fully filled out rather than loose or partially developed. Use leaf size and overall plant bulk as your guide: if growth has plateaued and the leaves feel crisp and substantial, cut and harvest promptly. For best eating quality, harvest in the morning and avoid delaying once the plant is fully mature.