Liatris

Liatris spicata

Engels: Blazing Star

perennialAsteraceae

Liatris (Liatris spicata) is a perennial from the Asteraceae family that grows up to 90cm tall. This plant thrives in full sun and requires low maintenance. Blooms in summer with purple flowers and attracts bees and butterflies.

Hoogte

60–90 cm

Breedte

30–40 cm

Zonligging

full sun

Waterbehoefte

low water needs

Grondsoort

sandy soil, loam

Onderhoud

low maintenance

Bloeitijd

summer

Bloemkleuren

purple

Ecologische waarde

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Verzorgingskalender

Taak	Jan	Feb	Mrt	Apr	Mei	Jun	Jul	Aug	Sep	Okt	Nov	Dec
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Care tips

Planting

Blazing star thrives in full sun and well-drained soil, making it ideal for sunny borders, prairie-style plantings, or gravel gardens. It tolerates both sandy soil and loam but will not perform well in heavy clay or waterlogged ground. If your soil is heavy, dig in plenty of horticultural grit or sharp sand before planting to improve drainage, as wet winter conditions can cause the corms to rot. Plant blazing star corms in March or April, once the worst of the winter wet has passed and the soil is starting to warm. Dig a hole about 10–12 cm deep and set each corm upright with the pointed end facing upwards. Space corms 35 cm apart to allow for their mature spread of 30–40 cm and to ensure good air circulation, which helps prevent fungal issues. If you're planting in groups for visual impact, arrange them in odd numbers—threes, fives, or sevens—for a more natural effect. After planting, firm the soil gently around each corm and water in well to settle the roots. Apply a 5 cm layer of mulch such as garden compost or well-rotted manure around the plants, keeping it clear of the emerging shoots. This helps retain moisture during establishment and suppresses weeds. Blazing star has low water needs once established, but during the first growing season water regularly during dry spells to help the roots develop. Staking is rarely necessary despite the height, as the sturdy flower spikes are surprisingly wind-resistant, though exposed sites may benefit from linking canes or grow-through supports installed early in the season.

Pruning

Blazing star requires minimal pruning, but a tidy-up in November keeps the plant healthy and the border looking presentable through winter. The main task is cutting back the spent flower spikes and foliage once they've died back fully. After flowering finishes in late summer, you can choose to leave the seed heads standing—they provide winter interest and food for goldfinches and other seed-eating birds—but by November the stems will have turned brown and brittle, and it's time to cut them down. Use a pair of clean, sharp secateurs or garden shears to cut all stems back to ground level, removing the entire above-ground growth. Blazing star dies back completely to its underground corm in winter, so there's no need to leave any stem length. Gather up and compost the cut material, or leave it in place as a light mulch if it's disease-free. If you notice any soft, rotting foliage during the growing season, remove it promptly to prevent fungal spread, though this is uncommon in well-drained sites. Deadheading during the flowering season is optional. Removing faded spikes as they finish won't encourage a second flush of flowers, as blazing star blooms once per season, but it does tidy the appearance and may prevent self-seeding if you want to control spread. Cut individual spikes back to the base of the stem. If you prefer a wilder look or want to encourage wildlife, leave the flowers to set seed. The plant's energy returns to the corm naturally after flowering, so deadheading is purely cosmetic rather than essential for plant health.

Maintenance

Blazing star is a low-maintenance perennial once established, with modest water and feeding needs. It has good drought tolerance thanks to its corm, so water only during prolonged dry spells in summer—once every two weeks is usually sufficient. Overwatering or poorly drained soil is far more harmful than underwatering, so err on the side of caution. In autumn and winter, natural rainfall is more than adequate, and the plant is fully dormant from November through to early spring. Feed once a year in March, just as new growth emerges. Scatter a handful of general-purpose granular fertiliser such as blood, fish and bone or Growmore around the base of each plant and lightly fork it into the soil surface. Avoid high-nitrogen feeds, which promote soft, leafy growth at the expense of flowers. Blazing star doesn't require rich soil and will perform well without heavy feeding. A light top-dressing of garden compost in spring also benefits soil structure and provides slow-release nutrients. Pests are rarely a problem, though slugs and snails may nibble emerging shoots in spring—use organic pellets, beer traps, or hand-picking if damage is severe. Powdery mildew can occasionally appear on foliage in late summer, especially in dry conditions or crowded plantings; improve air circulation and avoid overhead watering to minimise risk. Rust is another occasional fungal issue, causing orange spots on leaves; remove affected foliage promptly. Blazing star is fully hardy to zone 3a and needs no winter protection in temperate Europe. Refresh the mulch layer each spring to suppress weeds and conserve moisture. Clumps can be left undisturbed for years, though dividing every four to five years in early spring rejuvenates vigour and provides new plants.