Description
Introduction to Liatris ‘Purple Spires’ (Blazing Star)
Liatris spicata, also known as Blazing Star or Gayfeather, is a delightful perennial from the Asteraceae family, native to the prairies of eastern North America. Liatris ‘Purple Spires’ is an easy-care perennial that makes a stunning vertical accent wherever it is planted. It starts by forming dense clumps of low, thick, grassy-looking foliage. As summer progresses, it produces striking purple flower spikes that resemble feather dusters, opening from the top down. Blooming from mid to late summer, these flowers attract bees and butterflies, bringing vibrant life to your garden. Once established, Liatris is incredibly hardy, capable of withstanding the coldest winters and the hottest summers. This makes it a versatile and ecologically beneficial plant that any gardener will enjoy. They are excellent as border plants, in large containers, or as cut flowers.
Growing Conditions for Liatris ‘Purple Spires’
Liatris ‘Purple Spires’ is an easy-to-care-for, low-maintenance plant once established. It thrives in many parts of Australia, particularly in cool to mild subtropical climates found in New South Wales, Victoria, Tasmania, and the southeast of Queensland. This plant enjoys basking in full sun but can tolerate partial shade, especially in areas prone to hot afternoons. Additionally, Liatris ‘Purple Spires’ can grow well in various parts of Western Australia, including Perth and other regions with Mediterranean climates characterised by hot, dry summers and mild, wet winters.
To maintain the health of Liatris ‘Purple Spires’ in New South Wales, Victoria, and Queensland, ensure well-drained soil and provide regular watering during dry periods. In Tasmania, protect the plant from excessive winter moisture to prevent root rot. In Western Australia, including Perth and other regions, ensure adequate watering during the hot, dry summers and provide mulch to retain soil moisture and keep roots cool. These maintenance practices will help ensure the optimal growth and blooming of Liatris ‘Purple Spires’.
Soil Preparation
This perennial grows best in well-drained, organically rich soil. Amend heavy or clay soils with organic matter like compost to improve drainage. Ensure the soil is moderately fertile but not overly rich, as overly rich soil can lead to weak growth. Before planting, turn over the soil and mix in well-broken-down animal manure, blood and bone, or a complete fertiliser to provide essential nutrients. It is especially important during winter to ensure the soil is well-drained, as the plant can be susceptible to root rot if the roots remain too wet and do not have time to dry out between watering.
Watering Guidelines
Water newly planted corms thoroughly to establish strong roots and keep them evenly moist but not waterlogged. In cooler Australian climates, water newly planted corms thoroughly each week until they are established. Ensure the soil dries out between waterings to prevent root rot and use well-drained soil. During winter, reduce watering frequency, especially if there is sufficient rainfall, and ensure the soil does not remain soggy.
In warmer Australian climates, water newly planted corms weekly. Once established, Liatris should be watered moderately, allowing the soil to dry out between waterings. During prolonged summer droughts, even drought-tolerant Liatris benefits from weekly watering. Provide at least 2.5 cm of water each week to keep the plants hydrated. Additionally, apply a layer of mulch around the base of the plants to retain soil moisture and keep roots cool.
Once established, Liatris is drought-tolerant and only needs moderate watering, as the corms can conserve water. However, during prolonged summer droughts, ensure they are watered weekly with at least 2.5 cm of water to help keep the plants hydrated and promote healthy blooms.
Planting and Fertilisation Tips
Plant the corms in spring after the last frost, ensuring the crown is at soil level and spacing them 20-50 cm apart, ideally in clusters for a natural look. Liatris typically takes 70-90 days to bloom. While Liatris does not require heavy fertilisation, a light application of balanced, slow-release fertiliser in spring, when the plants emerge, should be adequate for most soils and can enhance growth. This can be especially beneficial to poor soil.
Maintenance and Division Tips
Deadhead spent flowers to encourage more blooms and maintain a tidy appearance. In winter, the tuberous roots remain while the top dies back. Cut back the stems to ground level during their winter dormancy. Plants will also readily self-sow if you don’t cut the flower stalks back after the blooming season.
To prevent overcrowding and promote healthy growth, divide the plants every 2-3 years in early spring.
Carefully dig them up after the foliage has died back, using a garden fork or spade to gently lift them from the soil. Remove any soil clinging to the corms by brushing it off gently, avoiding washing them with water. Inspect the corms for signs of damage, disease, or rot, discarding any that are soft, mushy, or show signs of decay. Cut the tuberous roots into sections with a sharp knife, ensuring each section has one “eye” or bud. Immediately plant the corms in their new locations, loosening the soil to at least 12 cm deep. Space pieces at least 20-50 cm apart to ensure good air circulation. Corms can also be divided and stored over winter for spring planting.
If storing Liatris corms during winter to be planted after the last frost, follow the removal steps and, once divided, allow the corms to dry in a cool, airy place for a few days to harden the outer skin and reduce the risk of mould and rot during storage. Place the dried corms in a breathable container, such as a paper bag, cardboard box, or mesh bag. You can also wrap them in a newspaper or place them in a container with dry peat moss, sawdust, or vermiculite. Store the corms in a cool, dark, and dry place, such as a basement, garage, or refrigerator, with an ideal temperature range of 5-10°C (41-50°F). Ensure the storage area is well-ventilated to prevent mould growth. Regularly check the corms during the winter for any signs of mould, rot, or excessive drying. If you notice any issues, address them promptly by removing affected corms or adjusting the storage conditions. By following these steps, you can ensure that your Liatris corms remain healthy and ready for planting in the spring.
Winter Protection for Liatris ‘Purple Spires’ in Frost-Prone Climates
Liatris corms do not necessarily need to be removed every winter if you live in a climate prone to frost. Liatris ‘Purple Spires’ is quite hardy and can withstand cold temperatures, including light frost.
To protect the corms during harsh winters, apply a thick layer of mulch (such as straw, leaves, or compost) over the planting area after the ground has frozen, which helps insulate the corms from extreme temperature fluctuations. Ensure the soil is well-drained to prevent waterlogging, as wet conditions combined with freezing temperatures can damage the corms. In areas with severe frost, you can cover the planting area with a frost blanket or other protective covering to add an extra layer of insulation. By taking these precautions, you can usually leave Liatris corms in the ground over winter, even in climates prone to frost. Only in areas with extremely harsh winters or poorly drained soil might it be necessary to dig up and store the corms to protect them from severe frost damage.
Summary
Liatris ‘Purple Spires’ is a versatile and low-maintenance perennial that adds a stunning vertical accent to any garden with its vibrant purple flower spikes. Its ability to attract pollinators, coupled with its hardiness and adaptability to various climates, makes it an excellent choice for both novice and experienced gardeners. By following simple planting, watering, and maintenance guidelines, you can enjoy the beauty and ecological benefits of Liatris ‘Purple Spires’ in your garden year after year.
Supplied as a pack of 3 dormant bulbs.
Important Reminder: While we strive for realistic representations of our products, factors such as climatic conditions, natural variation, or manufacturing changes may affect the exact appearance of each variety. Generally, the images used depict mature specimens, while the supplied stock is dormant or juvenile and will develop over time. These images are intended as a guide only.