Allium tuberosum
(sold as Kobold a couper, mauve flowering form)

Family: Amaryllidaceae

Common names: CHINESE CHIVE, CHINESE LEEK, FLAT CHIVE, GARLIC CHIVE

Native to: Southeast Asia

Plant

Type: perennial

Form: erect

Max height: 2 feet

Max width: 2 feet

Flower

secondary color present, white/off white

Leaf

green

Horticulture

Attracts wildlife: adult butterfly, bee, specific butterfly species

Plant features: naturalizes

Edible: vegetable

Exposure: part shade, sun

Propagates by: seed

flowers in summer

Soil types: average, well drained

USDA Zones: zone 3 -40 f, zone 4 -30 f, zone 5 to -20 f, zone 6 to -10 f, zone 7 to 0 f, zone 8 to +10 f, zone 9 to +20 f

Temp. range: -40 to +30 °F

Water: dry, regular

Allium tuberosum - aka CHINESE CHIVE, CHINESE LEEK, FLAT CHIVE, or GARLIC CHIVE - is a very popular perennial herb used especially in Chinese cooking. It is the leaves that are chopped and consumed in a number of dishes.

Vetted list of cultivars include:
Kobold a couper
Mauve flowering form

The following butterflies will nectar on Allium blossoms:
Abaeis nicippe
Aglais urticae
Ascia monuste
Euphydryas chalcedona
Euptoieta claudia
Hesperia sassacus
Hylephila phyleus
Junonia coenia 
Nathalis iole
Panoquina panoquin
Papilio glaucus
Papilio xuthus
Pholisora catullus
Piruna pirus
Poanes melane
Poanes zabulon
Vanessa cardui