FREE: Spinach seeds

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Spinach grows most quickly in well-drained soil rich in organic matter such as compost or composted manure and with a pH of 6.5 to 7. In order to grow spinach twice a year, plant it about 4 to 6 weeks before the last frost in the spring, and again 6 to 8 weeks before the first frost in the fall. Space plants 12 inches apart; this gives leaves room to reach full size. For the most tender leaves, encourage spinach to grow fast and without interruption by using nitrogen-rich soil amendments such as blood meal, cottonseed meal, or composted manure or timed-release fertilizer worked into the soil before planting. Or, use liquid fertilizer such as Bonnie Herb and Vegetable Plant Food regularly for quick growth.

Warmer weather causes spinach to bolt. The leaves do not taste as good when the plant is flowering.
When spinach begins to bolt in warm weather, it tastes bitter and is ready to be pulled. The plants look tall and spindly with thick stalks when they start flowering.
In the spring, plants will grow tall and bloom (called bolting) as soon as the days are longer than 14 hours. Heat also speeds up bolting, since spinach prefers temperatures between 35 and 75 degrees. Our variety is slow to bolt, which is a real bonus for gardeners who don’t have the luxury of long stretches of mild weather.