A stunning perennial with spikes of large, rich blue flowers with a dark black calyx from mid-summer to the first frosts. Dark green aniseed scented leaves. Height 1.5m. Spread 75cm. Full sun. Moist, well-drained soil. Hardy. Attracts bees.
Salvia guaranitica ‘Black and Blue’ is a striking perennial known for its tall spikes of vivid blue flowers paired with dramatic black calyces. With aromatic anise-scented foliage, this upright plant adds height and late-season colour to borders and wildlife gardens. Ideal for attracting pollinators, Salvia guaranitica ‘Black and Blue’ blooms from mid-summer through to the first frosts and grows to a height of 1.5m with a spread of 75cm.
PLANTING and AFTERCARE GUIDE
Best Planting Time
Spring: Plant Salvia guaranitica ‘Black and Blue’ in spring once the soil is warming and workable. This gives roots plenty of time to establish ahead of the flowering season.
Autumn: Alternatively, plant in early autumn to allow the plant to settle in and develop a strong root system before colder weather arrives.
Site Selection
Sunlight: Choose a location that receives full sun for best flowering. Salvia guaranitica ‘Black and Blue’ will tolerate light partial shade but thrives and blooms more profusely in sunny spots.
Soil: Ensure the soil is moist but well-drained. Incorporating compost or organic matter into the soil improves both drainage and fertility, supporting healthy growth.
Planting Instructions
Prepare the Hole: Dig a hole twice as wide and just as deep as the root ball.
Enrich the Soil: Mix in compost or well-rotted manure to enhance moisture retention and nutrient availability.
Planting: Place Salvia guaranitica ‘Black and Blue’ in the hole with the top of the root ball level with the surrounding soil. Backfill and firm down gently.
Water Thoroughly: Water well after planting to settle the soil and encourage root establishment.
Watering Requirements
During Growth: Salvia prefers evenly moist soil. Water regularly in dry periods, especially during flowering.
Established Plants: Once established, it is more drought tolerant but will benefit from watering during prolonged dry spells.
Dormant Season: Reduce watering significantly when the plant is dormant. Water only if conditions are particularly dry.
Feeding
Spring Feed: Apply a balanced fertiliser in early spring to support new shoots and healthy foliage development.
Mid-Season Boost: A liquid feed during flowering can encourage prolonged blooming and stronger stems.
Pruning
Deadheading: While not essential, removing spent flowers of Salvia guaranitica ‘Black and Blue’ can improve appearance and encourage continued blooming.
Autumn Cut Back: After flowering ends and frost has arrived, cut stems back to just above ground level to prepare for winter.
Mulching
Spring Mulch: Apply a layer of mulch in spring to retain moisture and suppress weeds. Compost, leaf mould or bark are ideal choices.
Winter Protection: Mulching in late autumn insulates the roots and helps protect against cold snaps and fluctuating temperatures.
Supporting the Plant
Staking: As Salvia guaranitica ‘Black and Blue’ can grow tall, support may be needed in exposed or windy spots. Use discreet stakes to keep stems upright and prevent damage.
Final Tips
Salvia guaranitica ‘Black and Blue’ is a magnet for bees and adds drama and colour to borders and containers alike. Its aromatic foliage and long flowering season make it a must-have for summer to autumn interest. Plant Salvia guaranitica ‘Black and Blue’ in a sunny, sheltered spot with moist, well-drained soil, and it will return year after year with vibrant, show-stopping blooms.
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