Rose Mallow Silver Cup

$4.49

Lavatera Trimestris

  • Seed Count 100
  • Show Stopper
  • Biennial
  • Height 60 cm

 

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Description

Winner of the Royal Horticultural Society’s prestigious Award Of Garden Merit, Rose Mallow Silver Cup has large hibiscus-like flowers, that are pink with a silver sheen.

It is a fast-growing plant that is well-regarded for its large, showy blooms.

A strong compact plant growing some 60cm tall by 40cm across that is suitable for containers or to plant on mass in garden beds.

Grows in pretty much any soil so long as it gets sunshine and shelter from winds. Plus It makes a great cut flower.

Find your Climate Zone

Method: Sow direct or seedlings
Soil Temp: 10°C - 25°C
Cool Mountain: Nov - Dec
Position: Part sun
Arid: Aug - Jan
Row Spacing: 30 cm
Temperate: Sep-Nov, Mar-Jun
Planting Depth: 3 mm
Sub Tropical: May - Oct
Harvest: 140 Days
Tropical: Jun - Aug
Plant Height: 60 cm

Soil Preparation 

 Soil type:

  • Well draining, sandy loam.
  • Tolerates poor soil but thrives in enriched soil. 

 pH:

  • Slightly alkaline to neutral (6.5–7.5). 

 Preparation:

  • Mix in compost or aged manure.
  • Avoid waterlogged areas. 

Sowing Seeds 

 Direct sowing:

  • Preferred due to taproot sensitivity. 

   Depth:

  • 5–10 mm. 

   Spacing:

  • 30–50 cm apart. 

 Germination:

  • 7–14 days at 18–22°C.
  • Keep soil moist. 

Sunlight & Watering 

 Sunlight:

  • Full sun (6-4 hours daily). 

 Watering:

  • Moderate. Water weekly; increase in heat.
  • Drought tolerant once established.
  • Mulch to retain moisture. 

Fertilising 

  • Use a balanced, low phosphorus fertilizer at planting.
  • Avoid excess nitrogen. 

Pruning & Maintenance 

  • Deadhead spent blooms to prolong flowering. 
  • Self seeding: Allow some flowers to seed for next season. 

Pests & Diseases 

 Common pests:

  • Aphids, snails, slugs.
  • Use neem oil or beer traps. 

 Diseases:

  • Prevent powdery mildew with good airflow.
  • Treat with sulphur spray if needed. 

Harvesting Seeds 

  • Collect dried seed pods.
  • Store in a cool, dry place. 

Companion Planting Guide 

Best Companions 

Pollinator Magnets:

  • Echinacea, Salvia, Sunflowers: Attract bees and butterflies, enhancing pollination. 
  • Kangaroo Paw: Native, drought tolerant, and complements Lavatera’s height. 

Pest Repelling Plants:

  • Marigolds: Deter nematodes and aphids. 
  • Nasturtiums: Trap crop for aphids. 
  • Lavender/Rosemary: Repel pests with aromatic foliage. 

Vegetable Garden Allies:

  • Tomatoes, Cucumbers: Lavatera attracts pollinators for fruiting crops. 
  • Beans: Fix nitrogen in soil, benefiting Lavatera. 

Aesthetic Pairings:

  • Ornamental Grasses: Contrast texture. 
  • Dianthus: Low growing, colourful border plants. 

Avoid Planting With:

  • Water loving plants (e.g., Lettuce, Ferns): Lavatera prefers drier conditions. 
  • Tall, dense plants (e.g., Corn): May shade Lavatera. 

Design Tips 

  • Use as a backdrop in cottage gardens or mixed borders. 
  • Pair with silver foliaged plants for contrast. 

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