Phlox Clouds of Perfume

Description

Pot size: 3-litre pot
Plant size after 3 years: Spread 0.5 metres, Height 0.4 metres

Foliage or flower colour: Soft lilac-blue flowers blooming in spring (April to May), medium green foliage
Suitable for USDA plant hardiness Zones: 3 to 8

GardenAdvice notes

Phlox ‘Clouds of Perfume’ is a cultivar of Phlox divaricata, commonly known as woodland phlox or wild sweet William, belonging to the family Polemoniaceae. Native to the deciduous woodlands of eastern North America, this perennial is cherished for its clusters of fragrant, soft lilac-blue flowers that grace gardens in early to mid-spring. Forming a loose mat of semi-evergreen foliage, it provides attractive ground cover even after the flowering season.

The delightful fragrance of its blooms attracts butterflies and hummingbirds, making it an excellent choice for wildlife-friendly gardens. Its low-growing habit and shade tolerance make it ideal for woodland gardens, shaded borders, and naturalized areas. Historically, Native American tribes utilized various Phlox species for medicinal purposes, although such uses are less common today.

Soil type

Phlox ‘Clouds of Perfume’ thrives in moist, well-drained, humus-rich soils with a neutral to slightly acidic pH (6.0 to 7.0). To mimic its natural woodland habitat, incorporate plenty of organic matter such as compost or leaf mould into the soil. This improves fertility and drainage, ensuring the plant has access to nutrients while preventing waterlogging. Consistent soil moisture is important, but avoid overly wet conditions that can lead to root rot.

Location

This plant prefers partial shade to full shade, flourishing under the canopy of deciduous trees where it receives dappled sunlight. East or north-facing aspects are ideal, providing morning light and afternoon shade. In hotter climates, protection from intense midday sun prevents leaf scorch and helps maintain soil moisture. Planting in sheltered locations also safeguards delicate blooms from strong winds.

Pest and disease problems

Powdery mildew is the most common disease affecting Phlox ‘Clouds of Perfume’, appearing as a white, powdery coating on leaves and stems. Preventive measures include:

• Air circulation: Space plants adequately to promote airflow.
• Watering practices: Water at the base to keep foliage dry.
• Fungicides: Apply at the first sign of infection, following label instructions.

Slugs and snails may feed on young foliage, creating irregular holes. Control methods:

• Handpicking: Remove pests during damp evenings.
• Barriers: Use copper tape or gravel mulches.
• Natural predators: Encourage birds, frogs, and hedgehogs.

Spider mites can be an issue in hot, dry conditions, causing stippling on leaves. Control by increasing humidity and using insecticidal soaps if necessary.

How to propagate

Division:

• Timing: Early spring before new growth or early autumn when temperatures are cooler.
• Method:
  • Carefully dig up the plant, preserving the root system.
  • Divide the clump into smaller sections with roots and shoots using a sharp knife or spade.
  • Replant divisions immediately at the same depth, water well, and mulch.

Softwood cuttings:

• Timing: Late spring to early summer from non-flowering shoots.
• Method:
  • Take 7–10 cm (3–4 inch) cuttings just below a leaf node.
  • Remove lower leaves and dip the cut end in rooting hormone.
  • Insert into pots with a mix of peat-free compost and perlite or sand.
  • Cover with a plastic bag or place in a propagator to maintain humidity.
  • Keep in a warm, bright area out of direct sunlight.
  • Roots develop in 4–6 weeks; acclimatize new plants before planting out.

Pruning, cutting back, and dividing

• Deadheading: Remove spent flowers after blooming to maintain appearance and encourage potential reblooming.
• Cutting back: In late autumn or early spring, trim any dead or untidy foliage to ground level to tidy the garden and reduce pest habitats.
• Dividing: Every 2–3 years, divide the plant in early spring or autumn to rejuvenate growth, prevent overcrowding, and maintain vigor.

Phlox ‘Clouds of Perfume’ is a charming, low-maintenance perennial that enhances shaded garden areas with its fragrant early spring blooms and attracts beneficial wildlife. With proper care and suitable conditions, it will flourish and bring joy to your garden for years to come.

Please note our plants in most instances are delivered by our own GardenAdvice expert gardeners. Our standard UK delivery charge is £25 or if you are a MyGardenTeam member delivery is free

Our plants are guaranteed for 24 months for more details Click Here