Yellow ironwort 1.5L

Yellow Ironwort – Durable and Decorative Perennial

Yellow Ironwort (Phlomis russeliana) is a striking and extremely hardy perennial, characterized by large, rough leaves and decorative, yellow inflorescences growing on tall stems. It is valued for its long flowering, drought resistance and ability to create attractive winter silhouettes. It is perfect for naturalistic gardens, perennial beds and prairie gardens.

Main characteristics of yellow ironwort

Flowers

• Colour: Intense yellow, contrasting with dark green leaves.
• Shape: The flowers are gathered in characteristic, whorled inflorescences arranged in tiers on high stems.
• Flowering period: June–August, often remaining decorative also after flowering.
• Decorativeness: Dried inflorescences create impressive silhouettes in a winter garden.

List

• Colour: Dark green, with a slight silvery tint.
• Shape: Large, heart-shaped, covered with coarse hairs that help reduce water loss.
• Decorativeness: They form dense, spreading clumps that retain their ornamental value throughout the season.

Cut

• Form: A tufted perennial with an upright habit and stiff flower stems.
• Height: 80–100 cm with flowers.
• Width: It grows 60–90 cm, forming impressive clumps.

Cultivation requirements of yellow iron wort

Location and soil

• Position: Full sun or partial shade – in full sun it blooms most profusely.
• Soil: Permeable, moderately dry to dry, sandy loam, preferably neutral or slightly alkaline.
• Humidity: It tolerates drought very well and does not require frequent watering.

Watering and fertilizing

• Watering: Minimal – grows well even in dry positions.
• Fertilization: It does not require intensive fertilization, a light organic fertilizer in spring is sufficient.

Care

• Trimming: After flowering, you can remove the stems, but in winter, dried inflorescences can be decorative.
• Reproduction: By dividing the clumps in spring or by root cuttings in autumn.
• Wintering: Fully frost hardy (zone 5–9), does not require protection.

Application of yellow iron

Flower beds and garden compositions

• Mixed beds: Goes well with rudbeckias, ornamental grasses, sage and coneflowers.
• Modern gardens: It gives structure and lightness to modern plant compositions.

Edging and paths

• Perfect for borders of beds and along paths, where its stiff shoots create an impressive structure.

Prairie and Naturalistic Gardens

• It suits plantings inspired by wild vegetation, where its durability and long flowering are a big advantage.

Ground cover

• Its large leaves are effective at suppressing weeds, making it an ideal choice for larger areas.

Plant Specifications

• Flower pot: 1.5 liters
• Age: 2 years old
  
• Frost resistance: Yes