Allium cepa Proliferum Group
Allium cepa Proliferum Group, Tree Onion, Catawissa Onion
Small greenish white flowers in second year, followed by small bulbs which form at the top of the stem. Hollow cylindrical mid green leaves. Culinary; the whole plant is edible.
• Hardiness: H5 (-10 to -15C)
• Type: Perennial
• Height: up to 1.5m
• Spread: 20cm
• Soil type: Fertile Sand, Loam, Free Draining
• pH: Universal pH
• Habit: Bulb
• Flowering colour: Green, White
• Flowering time: Summer in second year
• Uses: Culinary & Medicinal
• Attracts pollinators: No
• Container suitability: No
• UK native: No
• Caution: N/A
• Propagation: Division
• Maintenance: N/A
• Harvest: Tree onions can be picked off the stems and stored; lay them out on a rack in a cool place with good ventilation.
At Jekka’s we sell herbs in 1 Ltr and 2 Ltr pots. These are established and hardy herb plants that are grown following organic principals and to survive the UK climate. Please read Jekka's blog that contains her top steps to growing on your herbs.
Our herbs are designed to be grown in containers or planted in the garden. Although some herbs will be quite happy indoors, most prefer being outside. Please see our indoor growing blog for more information.
If you think your herbs need a little more attention we always recommend an environmentally friendly solution, and these are Jekka's top three:
- Maxicrop liquid seaweed: 'Feed on Fridays' as Jekka always says for all round good plant health.
- SB Invigorator: a safe and effective insecticide and fungicide to help control a wide range of pest species
- Epsom salts: the horticultural equivalent of what you put in your bath to top up magnesium and stop orange leaves.
One of our three core roots is that we are Environmentally Conscious and for the past 30 years all the herbs grown at Jekka’s have been raised following sustainable, environmentally friendly and organic approaches resulting in a remarkable biodiversity at the herb farm.
Our herb seeds are also untreated and can be used to grow organic herb plants.