Allium cepa (Aggregatum Group) 'Biztro'PBR (shallot 'Biztro') — Clump forming

Overview

Allium cepa (Aggregatum Group) 'Biztro'PBR is a clump forming bulbs in the genus Allium, part of the Amaryllidaceae family, with deciduous foliage. Allium cepa (Aggregatum Group) 'Biztro'PBR grows best in full sun, and tolerates most soils and any pH. Its UK hardiness is rated H6. Suggested uses include city and courtyard gardens, cottage and informal garden, gravel garden, patio and container plants, wildlife gardens, cut flowers and flower borders and beds.

About

Allium cepa (Aggregatum Group) 'Biztro' is a clump-forming shallot cultivar belonging to the Allium genus, known for its bulbous herbaceous perennials with a distinctive onion or garlic aroma. This deciduous plant thrives in full sun and well-drained soils, including chalk, clay, loam, and sand, across a range of pH levels. Hardy to UK zone H6, 'Biztro' is suitable for various garden settings such as city gardens, patios, and wildlife areas. It is best planted in autumn, with foliage allowed to die back naturally, and offers seasonal interest from spring through autumn.

About the genus

Allium is a large genus of monocotyledonous flowering plants with 1112 accepted species, making Allium the largest genus in the family Amaryllidaceae and among the largest plant genera in the world. Many of the species are edible, and some have a long history of cultivation and human consumption such as the onion, garlic, scallions, shallots, leeks, and chives.

Wikipedia contributors, "Allium", CC BY-SA 4.0 — Allium

Growing conditions

Best soil and position for Allium

Sunlight: Full sun
Soil type: Chalk, Clay, Loam, Sand
Soil pH: Acid, Alkaline, Neutral
Soil moisture: Well-drained
Aspect: South-facing, West-facing, East-facing
Exposure: Exposed, Sheltered
UK hardiness: H6

Plant details

Allium cepa (Aggregatum Group) 'Biztro'PBR size, habit and characteristics

Plant type: Bulbs
Habit: Clump forming
Foliage: Deciduous
Suggested uses: City and courtyard gardens, Cottage and informal garden, Gravel garden, Patio and container plants, Wildlife gardens, Cut flowers, Flower borders and beds

Care notes

Pruning and caring for Allium cepa (Aggregatum Group) 'Biztro'PBR

Propagation: Offsets, Seed
Pest resistance: Allium leaf miner, Onion fly
Disease resistance: Onion white rot, Onion downy mildew

Frequently asked questions

Where is the best place to plant Allium cepa (Aggregatum Group) 'Biztro'PBR?

Allium cepa (Aggregatum Group) 'Biztro'PBR prefers full sun. It suits exposed and sheltered positions.

What soil does Allium cepa (Aggregatum Group) 'Biztro'PBR need?

Allium cepa (Aggregatum Group) 'Biztro'PBR is adaptable and grows happily in most soil types, including chalk, clay, loam and sand. It is happy in soil of any pH. Aim for soil that stays well-drained.

Is Allium cepa (Aggregatum Group) 'Biztro'PBR hardy in the UK?

Allium cepa (Aggregatum Group) 'Biztro'PBR has an RHS hardiness rating of H6, meaning it is very hardy, tolerating -20 to -15°C across most of the UK.

How do I propagate Allium cepa (Aggregatum Group) 'Biztro'PBR?

Offsets, Seed.

More in the Allium genus

Browse all Allium →