Spinach
Heirloom Spinach Seeds: Nutrient-Dense Greens for Cool Weather
Spinach is the undisputed king of the cool-season garden. At Firefly Farm & Mercantile, we curate heirloom spinach seeds that are prized for their thick, succulent leaves and intense nutrient density. Acclimated to the shifting temperatures of the Driftless Region, our non-GMO varieties—from the classic crinkled "Savoy" types to modern smooth-leaf hybrids—are selected for their vigor and ability to provide a bountiful harvest before the summer heat sets in.
Spring and Fall Success: Mastering the Harvest
Because spinach thrives in temperatures as low as 20°F, it is one of the first crops you can sow in the spring and one of the last you can harvest in the late fall. We focus on bolt-resistant varieties, which allow you to extend your harvest window even as the days grow longer. Whether you are growing "Bloomsdale" for its traditional flavor or searching for a fast-growing baby spinach variety, our seeds provide the high germination rates necessary for a dense, productive garden bed.
Quick Spinach Growing Facts:
- Planting Window: Early spring (as soon as soil can be worked) and late summer (for a fall harvest).
- Cold Hardiness: Extremely hardy; can survive frost and light snow with minimal protection.
- Hardiness Zones: Ideal for USDA Zones 3-9.
- Soil Preference: Loves nitrogen-rich soil with good drainage and a pH of 6.5 to 7.0.
- Expert Tip: For the sweetest flavor, harvest spinach after a light frost in the fall. The cold causes the plant to convert starches into sugars, resulting in a superior taste that you simply cannot find in grocery store greens.
Explore our heirloom spinach varieties below. Every packet is packed with care and includes detailed sowing instructions to help you grow a high-yield, healthy garden.
