Start growing
Seeds require patience. Keep weed-free as onions are poor competitors.
GROW SOMETHING WONDERFUL
Onion Seeds In A Cup® Grow Kit
Allium cepa
From the first seed to the next new leaf. Explore your plant’s growing conditions, seasonal rhythm, and everyday care.
THE PLANT NOTEBOOK
Onion care, from seed onward.
- Botanical name
- Allium cepa
- Common names
- Garden Onion, Bulb Onion
- Family
- Amaryllidaceae
- Genus
- Allium
- Species
- A. cepa
Growing with your kit
Use the Seeds In A Cup® kit to start delicate seeds in a controlled environment before garden transplanting.
Propagation
By seed, 'sets' (small bulbs), or transplants.
Seasonal growth & harvest
100-120 days from seed. Harvest when tops fall over and turn brown.
Growing conditions
Friable, fertile loams with full sun.
Weather & tolerances
Frost hardy; sensitive to photoperiod (day length) for bulb formation.
Pests & plant health
Onion maggot and downy mildew.
Plant safety
Safe for humans; toxic to dogs and cats (causes hemolytic anemia).
Botanical features
A biennial bulbous plant grown as an annual. Consists of a subterranean bulb of modified leaves.
Varieties
‘Walla Walla Sweet’, ‘Red Burgundy’, ‘Yellow Granex’.
Garden & everyday uses
Essential culinary base. long storage life
Native range & distribution
Cultivated globally; wild ancestors likely from Central Asia.
Conservation
Global staple.
Name origins
Latin ‘unio’, meaning unity or one, referring to the single bulb composed of many layers.
History
Used by Egyptians as a symbol of eternity and placed in tombs of pharaohs.
TURN KNOWING INTO GROWING
Your next beginning, in a cup.
Seeds In A Cup® grow kits matched to onion.
THE GROWING CONVERSATION
Questions grow here.
Have a question about onion? Ask Buddy below or contact our team.