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Spinach Seeds, Giant Noble
Description
(Spinacia oleracea). This is the giant of the spinach clan. Plants spread to 25 inches! The tender leaves are great for canning, steaming, or salads; it’s a great choice for those who want both quantity and quality. Introduced in 1926.
- 45 days to maturity
- 6-10 hours of sun
- Sprouts in 7-14 days
- Ideal Temperature: 45-75 F
- Seed Depth: 1/2"
- Plant Spacing: 6-8"
- Frost Hardy: Yes
Growing Tips, Tricks and FAQs
Growing Tips
 Giant Noble spinach grows best in cool weather. It prefers full sun to partial shade and grows well in fertile, well-drained soil. Regular watering is important to keep the soil moist, which helps prevent the plants from bolting. This spinach variety is cold-hardy and can tolerate light frosts, making it suitable for extended growing seasons in USDA zones 4-9.
When to Grow
Giant Noble spinach should be planted in late winter to early spring, as soon as the soil can be worked. Its ability to tolerate light frost makes it an excellent choice for extending the harvest season into early winter in milder climates. Succession plant every 2-3 weeks to ensure a continuous supply of fresh leaves throughout the growing season.
How to Sow and Plant
Sow Giant Noble spinach seeds directly into the garden soil at a depth of about 1/2 inch, spacing them 2-4 inches apart in rows 12-18 inches apart. Once the seedlings have emerged, thin them to about 6-8 inches apart to give the plants adequate room to grow.
How to Grow
Giant Noble spinach requires consistent moisture to produce tender leaves, so regular watering is key. Keep the soil evenly moist but avoid waterlogging. Mulching around the plants can help retain soil moisture and prevent weeds. Fertilize with a nitrogen-rich fertilizer or compost to encourage healthy leaf development. While this variety is relatively resistant to bolting, providing partial shade during hot weather can help maintain leaf quality. Spinach prefers cooler temperatures, so protect it from heat stress by planting in shaded areas or using shade cloth.
How to Save
- In spring, plants will grow tall and bloom (or bolt) as soon as the days are longer than 14 hours. Heat also speeds up bolting, since spinach prefers temperatures between 35 and 75 degrees.
- Commercial spinach seed crops are separated by 5-10 miles. Spinach pollen is so fine that it easily penetrates mesh screening, but is severely restricted by spun polyester fabric.
- Plants are either male or female. Maintain a ratio of one male to two female plants, though this is hard to determine until the seed stalks have formed. Close plantings in wide beds will provide the greatest chance that the ratio will be hit.
- Starting at the bottom of the plants, strip off the seeds (using gloves for the prickly type) in an upward motion, letting them fall into a bag.
- Allow to completely dry and store.
- They will retain 50% germination for up to 5 years when stored in ideal conditions (cool, dry, and dark).
FAQ
Can Giant Noble spinach be grown in containers?
Yes, it can. Use a container that is at least 6-8 inches deep with good drainage, filled with high-quality potting mix. Ensure the container receives plenty of sunlight, and keep the soil consistently moist for optimal growth.
What are common pests and diseases affecting Giant Noble spinach?
Common pests include aphids, leaf miners, and slugs, while diseases like downy mildew and spinach blight can occur. Use organic pest control methods such as insecticidal soap or neem oil to manage pests, and ensure proper spacing and air circulation to reduce the risk of diseases. Regularly inspect plants for signs of pests and take action promptly to prevent infestations.
Can Giant Noble spinach tolerate frost?
Yes, Giant Noble Spinach is cold-hardy and can tolerate light frosts, making it suitable for late winter to early spring plantings. However, severe frosts may damage the plant, so consider using row covers or cold frames to protect the spinach in harsher conditions.
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