The ornamental garlic bulbs are planted in the ground in autumn, shortly followed by the long, cold winter months, with frost not being uncommon. How well do freshly planted ornamental garlic bulbs, as well as older plants, tolerate frost?
Does ornamental onion tolerate frost?
Most ornamental garlic varieties are hardy and tolerate frost well. For frost-sensitive varieties, they should be moved to a cool, frost-protected winter quarters or the bulbs should be dug up and stored cool and frost-free. Hardy varieties do not require frost protection.
Does ornamental onion tolerate frost?
Most ornamental garlic varieties are hardy and can tolerate frost. However, there are some exceptions that are less able to tolerate temperatures below 0 degrees Celsius.
How do I overwinter ornamental onions?
Frost-sensitive varieties should not be overwintered outdoors, but in afrost-protected winter quarters. However, it is important to note that these are not too warm. Temperatures between 5 and 10 degrees Celsius are ideal. It shouldn't be warmer, as the ornamental onion is a cold germinator and needs the cold in order to be able to sprout vigorously again next year. So that the move to winter quarters can be carried out with little effort, it is recommended to plant frost-sensitive allium varieties in movable pots (€75.00 on Amazon) or pots. This means they can easily be moved to their winter quarters in the fall.
How do I overwinter ornamental garlic that is planted outdoors?
If you have planted frost-sensitive varieties in beds, you should proceed as follows:
- Allium in autumn completelycut back
- OnionsDig up and remove any remaining soil
- Overwinter the onions in an airy,cold but frost-free place in a box with some sand
After the last frost, you can plant the bulbs back outdoors in their original location in spring.
How do I protect hardy varieties from frost?
Winter-hardy allium varieties must benot protected from frost. When planting, make sure to plant the bulbs deep enough in the soil to protect them from both frost and drying out. Afterwards, no further protective measures against the cold are necessary and do not benefit the well-being of the plant.
Tip
Stop fertilizing ornamental garlic in good time
You should no longer fertilize alliums from summer onwards. This allows the plant to slowly prepare for hibernation and no longer develops new, frost-sensitive shoots.