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Alcea 'Polarstar'

Alcea 'Polarstar'

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Product description

Featuring luminous, ice-white petals arranged elegantly around a soft, pale yellow centre, this pristine selection practically glows in low-light conditions, making it a staple for twilight or "moon" gardens. The pure, clean colouration is frequently utilised by landscape designers to visually cool down brightly coloured, aggressive planting arrangements and provide a resting place for the eye. The bright white, saucer-like blooms open wide, creating a highly visible, towering column of light.

The tender, emerging shoots of this specific plant are highly attractive to nocturnal pests, you must maintain a clear, debris-free zone around the base to eliminate dark, damp hiding spots for slugs and snails. Avoid planting this variety in dense, heavy soils, as the taproot requires loose, friable earth to establish the necessary foundation for its towering height. As the flowers fade from the bottom up, meticulously snip off the dead heads with sharp scissors to keep the white column looking sharp, pristine, and free of brown, decaying matter.

Please Note: When purchasing plants, please consider that each live item is unique and may therefore differ from the images shown, which are for illustration purposes only. The plant will be supplied in a growers pot. Depending on season, some plants may be pruned back to encourage growth and deciduous plants may arrive without leaves.

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Plant specs, care guide & tips

Key features

Fast Growing
Hardy
Perfect for Pots
Colourful
Sun Lover
Low Maintenance

Specifications

Botanical Name
Alcea rosea 'Polarstar'
Plant type
Colour
Eventual Height
1 - 2.5m
Eventual Spread
0.5 - 1m
Hardiness
Hardy
Life Cycle
Deciduous
Sun Requirement
Full Sun
Growth Rate
Fast

When to plant

JanFebMarAprMayJunJulAugSepOctNovDec
Planting
Period of Interest

Planting and period of interest times are general guidelines and may vary based on your location and conditions. For best results, consult local gardening resources.

Instructions

Top Tip

Plant this luminous white variety against a dark backdrop to make the pale blooms stand out dramatically. Avoid planting it in cramped corners where poor air circulation invites powdery mildew. Thinning out some of the basal leaves on the Alcea Polarstar improves airflow around the crown significantly.

How to Water

Provide extra hydration during prolonged periods of dry weather to keep the leaves from wilting. Focus your efforts on the surrounding soil rather than the Alcea Polarstar itself. Consistent hydration helps the pure white flowers maintain their luminous quality without browning at the edges.

How to Plant

Ensure the planting area is completely free of large rocks or debris that might impede root growth. Mix a balanced granular fertilizer into the soil at the bottom of the hole for a gentle nutrient boost. Firm the ground around the stem with your heel to anchor the Alcea Polarstar securely.