Days to Maturity: Approximately 40-50 days from transplant to full harvest (can harvest baby leaves earlier in 28-35 days).
Sun Needs: Full sun to partial shade (4-6+ hours of direct sun ideal); provide afternoon shade in Utah's hot summers to delay bolting and maintain tenderness.
Season Type: Cool-season crop; best in spring (plant as soon as soil is workable, around 40°F+) and fall (late summer sowing for harvest before hard freezes); tolerates light frosts and even overwinters with protection.
Plant Habit & Support: Upright, compact rosettes 8-12 inches tall and wide; no support needed—space 4-6 inches apart for baby greens or 6-12 inches for full plants in rows 12-18 inches apart.
Other Notes: Slow-bolting and bolt-resistant relative to other heirlooms; watch for aphids, leaf miners, slugs, or downy mildew—good airflow, consistent moisture, and organic mulch (like straw or compost) help prevent issues; excellent for succession planting every 2-3 weeks to maintain fresh supply for markets or nursery sales.
Best Planting Method: Transplant when soil is workable—space appropriately in beds or rows. Amend soil with compost for fertility and good drainage; raised beds are beneficial in heavier or alkaline Utah soils to avoid waterlogging. Organic mulch (such as straw, compost, or grass clippings) around plants retains moisture, moderates soil temperature, and suppresses weeds.
Watering Needs: Maintain consistently moist soil (about 1-2 inches per week) without sogginess—key to preventing bitterness, bolting, or tip burn; use drip irrigation or water at the base to keep foliage dry in dry Utah air. Mulch helps hold moisture during warmer spells; containers require more frequent checks as they dry out faster—aim for even moisture to support tender leaves.
Fertilization Needs: Mix in compost or balanced organic fertilizer at planting for nutrient-rich soil. Spinach is a moderate feeder—apply a light side-dressing of nitrogen-rich organic option (like compost tea or fish emulsion) midway if leaves seem pale or growth slows, but avoid over-fertilizing to prevent soft, disease-susceptible foliage. Harvest outer leaves regularly for cut-and-come-again (promotes regrowth) or cut the whole plant at the base when mature; quick, repeated harvests keep quality high and extend the productive window before bolting sets in.