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Onion Seeds, Red of Florence
Description
(Allium cepa). Long day (potentially intermediate). Our favorite red onion, this torpedo-shaped allium from the capital of Tuscany has a delectable, perfectly balanced flavor and grows exceptionally well indoors or outdoors at our farm in Missouri. The oblong shape makes for easier cutting and more uniform slices! The red bulbs also contain anthocyanin, a healthful antioxidant. These oblong, bright red onions are great for planting in spring or fall; they are widely adapted and seem to do well in many areas. They are very mild and sweet, great for salads and pickling! A delicious and very rare Italian heirloom.
- 100-120 days to maturity
- 6-12 hours of full sun
- Sprouts in 7-14 days
- Seed Depth: 1/4"
- Plant Spacing: 4-6"
- Ideal Temperature: 45-80 F
- Frost Hardy: Yes
Growing Tips, Tricks and FAQs
Growing Tips
Red of Florence onions flourish in full sunlight and require soil that is fertile and well-draining. Consistent watering is important, especially as the bulbs form. Add mulch to conserve moisture while keeping weeds at bay.
When to Grow
Start seeds indoors three months before the last expected frost date in spring. Transplant acclimated, stocky seedlings into the garden 4-6 weeks before the last frost of spring, as onions can tolerate light frosts. As an intermediate-day onion, it thrives in regions with daylight lasting 12-14 hours during the growing season.
How to Sow and Plant
Plant seeds 1/4 inch deep in seed-starting trays or directly in the garden after the danger of frost has passed. Germination usually takes 7-14 days when soil temperatures are around 60 F. Space seedlings 4-6 inches apart, with 12 inches between rows, and amend the soil with organic compost to encourage healthy growth.
How to Grow
Feed with a balanced fertilizer or compost tea every 2-3 weeks. Keep the soil consistently moist but avoid waterlogging, which can cause rot. Use mulch to maintain soil moisture and suppress weeds. When the tops start to yellow and fall over, stop watering to allow the bulbs to cure before harvesting.
How to Save
- Onions will cross with other onions, and occasionally they will cross with scallion types like Welsh onions and Hi Shi Ko bunching onions. Onions will never cross with leeks, chives or garlic.
- If you are growing types that will cross, try to isolate varieties by at least several hundred feet or ideally up to one mile.
- Onions are a biennial seed crop, so you will need to overwinter your first-year roots, ideally by digging them up and storing them for the winter. Replant in early spring, and allow onions to shoot up spikes of purple flowers.
- Let seeds become dry on the plants. Pick seeds when they are hard and dark black, then bring them indoors to finish drying.
- Once dry, separate the seeds from the husks or leave them on and plant them husks and all.
FAQ
Can I grow Red of Florence onions in pots?
Yes, their elongated bulbs are well-suited for container gardening, as long as they have adequate depth and space.
Are Red of Florence onions good for grilling?
Yes, their shape and sweetness make them ideal for grilling whole or sliced. They are also great for salads, or other fresh dishes.
How long can I store Red of Florence onions?
Although they can be stored for a couple of months, they are best enjoyed fresh to savor their delicate flavor.
How do I determine day length and first-last frost in my area?
Check out our blog post: Our Experts Answer Questions, Share Resources for links to online guides.
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