Nobel Giant Spinach

Spinach

40d to harvest

Sink your senses into Nobel Giant Spinach’s lush, velvety foliage—deep, cool-green leaves that unfurl with a tender, succulent bite. At maturity in about 40 days, the plants form an impressive rosette of broad, smooth-to-slightly crinkled leaves that hold their freshness for satisfying, spoonable greens. Ideal for gardeners who want a bold harvest from a cool-season window, Nobel Giant Spinach shines in fresh salads, quick sauté-style preparations, and creamy sauces alike.

Crop Dates

Growing note: In frost-free Zone 10a, 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)	6

Frequently Asked Questions

What pest or disease commonly affects Spinacia oleracea (Nobel Giant Spinach), and how do I manage it at home?

Spinach commonly suffers from downy mildew (often first seen as pale yellow spots on leaves with a gray-purple growth on the underside). Remove and discard affected leaves early, then improve airflow around plants and avoid overhead watering. If problems are spreading, apply a labeled fungicide that includes downy mildew control for leafy greens, following the label’s waiting period before harvest.

During the main growing phase, how often should I water Nobel Giant Spinach to keep soil moisture right?

Keep the top 1–2 inches of soil evenly moist, because Spinacia oleracea dries out quickly and that can trigger bitterness and early bolting. In typical home gardens, water about 1–1.5 inches per week total, adjusting to rainfall and heat so plants don’t get long dry spells; check soil moisture daily in warm periods. Water at the soil line to keep leaves as dry as possible, especially during humid weather.

How can I tell when Nobel Giant Spinach (Spinacia oleracea) is ready to harvest?

Harvest when leaves are large enough to eat and feel firm (typically around 40 days from sowing for full-size leaves). Pick outer leaves first to keep the plant producing, cutting with clean scissors at the base of each leaf. If leaves start tasting harsh or the plant bolts with a flowering stalk, harvest immediately and stop waiting for additional size.