Yellow of Parma Onion​


  • One of the best onions for storage
  • Long-day onion
  • Bulbs grow to 1 pound
  • Globe-shaped, solid bulbs
  • Late-maturing
  • 110 days from transplant

Item Details

A top-quality, late-maturing onion with golden, globe-shaped bulbs weighing an average of 1 pound, this variety hails from northern Italy. It has a mild, sweet taste when fresh, but its flavor intensifies when it is stored. One of the best onions varieties for storage. Long-day type. 110 days from transplant. ±7,700 seeds/oz

History of the Plant

Yellow of Parma onion is an heirloom, late season variety from Italy known for its long storage life. Growers report still having a store of onions from last year when planting time arrived the following spring. The flavor will get spicier the longer the onion is in storage, but they start out very mild and sweet.

Learn to Grow Yellow of Parma Onion

Start Indoors: 6 weeks before last frost

Germination: 7-14 Days

Plant Outdoors: 24-36” Apart

Light: Full Sun

Growing Media



Seed Depth: 1/4–1/2″
Space Between Plants: 5–8″
Space Between Rows: 6–8″
Germination Soil Temperature: 55–85°F
Days for Germination: 5–13
Sow Indoors: 4–6 weeks before average last frost date.
Sow Outdoors: 2–3 weeks before average last frost date.



Prefers well drained sandy, loamy, or clay soils. A pH of between 6.0 and 7.5 will keep plants healthy and nourished. Soil must be loose for proper bulb development.



Germinate seeds in a soilless mix of either well-rotted manure or vermiculite for optimum growth.



Thrives in hydroponic systems, including media-based ebb and flow systems. Use rockwool, perlite, or gravel as your growing medium.



Will grow well under standard 40-watt fluorescent bulbs. Keep lights at least 4 to 6″ above the tops of plants to prevent overheating or burning.




Requires moderate levels of water. Onions are drought tolerant and will survive dry periods, but consistent moisture is required for the best quality, sweetest bulbs.



Requires moderate levels of nutrients. Add compost before planting, and side-dress every 3 weeks with compost or a balanced organic fertilizer during vegetative growth period. Needs more potassium and phosphorus than nitrogen. Reduce fertilization once plant tops have reached full size.



Once a plant has sent up its flowering stalk, remove it unless you are growing your own seeds. At this time, the bulbs are past their prime.



Use a light layer of mulch to maintain soil moisture and suppress weeds. Don’t mound the mulch around the base of the plant where it emerges from the soil. This area is sensitive to rot if kept too moist.




Provides vitamin C, potassium, and calcium. Leaves are rich in vitamin A. Also a good source of antioxidants and sulfur-containing compounds.



Historically prescribed for infertility, constipation, headaches, coughs, snakebites, and hair loss. Onions have anti-inflammatory and anti-cancer properties and can be beneficial for cardiovascular health, bone density, and joint health.

Amazing Recipes of Yellow of Parma Onion (Coming Soon)

Greenhouse to Your House

Who can resist a prosciutto pizza recipe? How about lining it up with apples and onions


Protein-packed eggs with antioxidant-rich broccoli make this a healthy and satisfying breakfast choice.


Make our simple tomato bruschetta as a classic Italian starter. Ideal for a summer gathering with friends, this easy dish is fresh, tasty and full of flavour.


Healthy, low-calorie and gluten-free – these herby egg ‘pancakes’ will become your go-to favourite for a quick midweek meal.

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