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Spinach Planting Program

Johnny's

SPINACH
Planting Program

Spinach Succession Planting & Season Extension

Johnny's Spinach Planting Program is designed to take the guesswork out of succession planting, allowing you to easily extend your spinach harvest throughout the growing season. Slow-growing spinach varieties mature best under warm conditions, whereas faster-growing varieties mature best under cooler conditions.

Choose Spinach Varieties by Sowing & Harvesting Periods
Sowing & Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
Late Winter/
Early Spring
Sowing
Harvesting
Features
Leaf Days to Maturity Color Growth Rate Bolting Downy Mildew Resistance
Heavily savoyed 38 Dark green Fast Fast

Sowing & Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
Late Winter/
Early Spring
Sowing
Harvesting
Features
Leaf Days to Maturity Color Growth Rate Bolting Downy Mildew Resistance
Smooth, thick, small, spade-shaped 30 baby; 42 full-size Dark green Slow Slow Races 1–12

Sowing & Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
Late Winter/
Early Spring
Sowing
Harvesting
Features
Leaf Days to Maturity Color Growth Rate Bolting Downy Mildew Resistance
Smooth 23 babyleaf; 34 full-size Medium green; dark red veins Fast Fast Races 1–13, 15
Sowing & Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
Late Winter/
Early Spring
Sowing
Harvesting
Features
Leaf Days to Maturity Color Growth Rate Bolting Downy Mildew Resistance
Savoyed, rounded tips 37 Dark green Fast Fast Races 1–13, 15
Sowing & Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
Late Winter/
Early Spring
Sowing
Harvesting
Features
Leaf Days to Maturity Color Growth Rate Bolting Downy Mildew Resistance
Smooth, oval 39 Very dark green Medium Slow Races 1–11, 13
Sowing & Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
Late Winter/
Early Spring
Sowing
Harvesting
Features
Leaf Days to Maturity Color Growth Rate Bolting Downy Mildew Resistance
Smooth 37 Medium-dark Medium Slow Races 1–15
Sowing & Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
Late Winter/
Early Spring
Sowing
Harvesting
Features
Leaf Days to Maturity Color Growth Rate Bolting Downy Mildew Resistance
Semi-savoyed 37 Dark Medium Medium Races 1–10
Sowing & Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
Late Winter/
Early Spring
Sowing
Harvesting
Features
Leaf Days to Maturity Color Growth Rate Bolting Downy Mildew Resistance
Smooth, oval to round 36 Dark green Fast Fast Races 1–13
Sowing & Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
Late Winter/
Early Spring
Sowing
Harvesting
Features
Leaf Days to Maturity Color Growth Rate Bolting Downy Mildew Resistance
Smooth 23 babyleaf; 34 full-size Medium green; dark red veins Fast Fast Races 1–13, 15
Sowing & Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
Late Winter/
Early Spring
Sowing
Harvesting
Features
Leaf Days to Maturity Color Growth Rate Bolting Downy Mildew Resistance
Arrowhead 37 Dark green Fast Medium Races 1–13
Tech Tip

At higher latitudes, such as here in Albion, Maine, spinach can be grown in a hoophouse right through winter. The key is to have the spinach established before the day length drops below 10 hours, after which growth rate slows to a standstill but tolerance to cold temperatures remains in effect, allowing for winter harvest and overwintering for early spring harvest.

Seeding for winter production occurs at the warmest time of the year, when spinach traditionally performs poorly. Keep the soil moist and cool, but monitor well to prevent damping off. Irrigating cools the soil in two ways: by physically cooling the soil through cold water; and by evapotranspiration, which is when evaporation draws heat from the soil.