Spinach Planting Program

Johnny's SPINACH Planting Program

Spinach Succession Planting & Season Extension

Johnny's Spinach Planting Program is designed to illustrate which spinach varieties to plant, grow, and harvest in sequence, allowing you to extend your spinach harvest across the seasons. Slow-growing spinach varieties mature best under warm conditions, whereas faster-growing varieties mature best under cooler conditions.

Establish your spinach production plan by evaluating the sowing and harvesting slots indicated in the charts below.

Note: Downy Mildew resistances are HR (high) unless noted.

Sowing & Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
Late Winter/
Early Spring
SOWING
SOWING
HARVESTING
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-leaf; 42 full size Dark green Slow Slow Races 1–12; IR: 14
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
Upright; smooth to slightly savoyed 39 Medium dark green Medium Slow Races 1–3, 5–6, 8, 11–12; Additional IR to Cladosporium Leaf Spot (Cv)
Sowing & Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
Late Winter/
Early Spring
SOWING
SOWING
HARVESTING
HARVESTING
Features
Leaf Days to Maturity Color Growth Rate Bolting Downy Mildew Resistance
Upright; semi-savoyed 27 baby-leaf; 37 full size Dark green Fast Medium Races 1–13, 15
Sowing & Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
Late Winter/
Early Spring
SOWING
SOWING
HARVESTING
HARVESTING
Features
Leaf Days to Maturity Color Growth Rate Bolting Downy Mildew Resistance
Upright; smooth, uniform, oval 39 Very dark green Slow Slow Races 1–11, 13
Sowing & Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
Late Winter/
Early Spring
SOWING
HARVESTING
Leaf Days to Maturity Color Growth Rate Bolting Downy Mildew Resistance
Smooth 37 Medium dark green Medium Slow Races 1–15
Sowing & Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
Late Winter/
Early Spring
SOWING
SOWING
HARVESTING
HARVESTING
Features
Leaf Days to Maturity Color Growth Rate Bolting Downy Mildew Resistance
Upright; semi-savoyed 37 Dark green 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
Upright; semi-savoyed 25 baby-leaf; 35 full-size Dark green Fast Fast 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; long-stemmed; uniformly 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
Upright; smooth, uniform 23 baby-leaf; 34 full size Medium green, with 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
SOWING
HARVESTING
HARVESTING
Features
Leaf Days to Maturity Color Growth Rate Bolting Downy Mildew Resistance
Arrowhead; long-stemmed; uniform, smooth 37 Dark green Fast Medium Races 1–11, IR: 12–13
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
Semi-savoyed; round-to-oval; moderately upright 38 Medium green Medium Medium Races 1–11


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.