Tomato

Heirloom Tomato Seeds: Curated and Farm-Tested for the Northern Garden

At Firefly Farm & Mercantile, tomatoes are more than just a crop—they are our passion. As our largest seed category, we take pride in trialing many of these varieties right here on our farm in the Driftless Region of Wisconsin. This allows us to personally vouch for the flavor, vigor, and productivity of our heirloom tomato seeds in northern climates. By choosing our non-GMO, open-pollinated varieties, you are opting for the complex, rich flavors that commercial grocery store tomatoes have long forgotten.

A World of Flavor: Slicers, Paste, and Cherry Tomatoes

The secret to a successful tomato harvest is matching the variety to your kitchen needs. Our collection includes massive Beefsteaks for the perfect summer sandwich, meaty Paste Tomatoes for rich sauces and canning, and sugary-sweet Cherry Tomatoes that rarely make it out of the garden. We offer both Indeterminate varieties (vining types that produce all season) and Determinate varieties (bush types perfect for small spaces or concentrated harvests), ensuring there is a perfect tomato for every Wisconsin garden bed.

Quick Tomato Growing Facts:

• Planting Window: Start seeds indoors 6–8 weeks before the last frost. Do not transplant outside until the soil is warm and all danger of frost has passed (typically late May in the Driftless Region).
• Sunlight: Requires full sun (8+ hours) to achieve maximum sugar content and fruit size.
• Support: Most heirlooms are indeterminate and require a sturdy cage, stake, or trellis to keep the fruit off the ground and prevent disease.
• Hardiness: Extremely frost-sensitive; thrives in the warm, humid days of a Wisconsin summer.
• Expert Tip (The Deep Plant): When transplanting your tomato starts into the garden, bury them deep! You can bury up to two-thirds of the stem; the plant will grow extra roots all along the buried portion, resulting in a massive, resilient root system that can better withstand summer dry spells.

Explore our vast selection of traditional, rare, and farm-tested heirloom tomato seeds below. Every packet includes expert sowing instructions to help you grow the most delicious harvest of your life.