Aster Optimo Red Seed produces extra-large, double, chrysanthemum-shaped blooms in a rich red shade for standout garden colour and cut-flower use. It is ideal for South African gardeners wanting upright seasonal flowers with strong vase appeal.

View Our Detailed Grow Guide: Aster Grow Guide for South African Conditions

Plant Information

• Plant Type: Annual cut flower.
• Scientific Name: Callistephus chinensis
• Common Name: China aster / annual aster.

Growing Information

• General Sowing Time: Regional timing varies; Western Cape Mar-May and Aug-Sep, Highveld Aug-Oct or Feb-Mar, KZN Coast Apr-Jul, and other regions adjusted around frost and extreme heat.
• Position: Full sun; light afternoon shade in very hot areas.
• Sow Depth: 0.5-1 cm.
• Spacing: 25-30 cm between plants.
• Germination: 7-14 days at around 18-22 C.
• Height: About 30-90 cm, depending on variety and conditions; support taller stems if needed.
• Available Pack Sizes: 1000 raw seed, 20 raw seed

Why Grow Aster Optimo Red?

• Rich red blooms add warmth, contrast and strong picking-garden impact.
• Extra-large, double, chrysanthemum-shaped blooms have excellent cut-flower appeal.
• Glossy green foliage helps the plants look attractive before and during flowering.
• Useful for adding upright colour to cottage-style beds, borders and dedicated cutting rows.
• Pairs well with other seasonal cut flowers such as zinnias, cosmos and marigolds.

Garden Uses

Grow Aster Optimo Red in cutting beds, flower borders and cottage-style plantings where its red blooms can be enjoyed outdoors and picked for arrangements.

Growing Notes

• Start in seed trays for best results, then transplant carefully without disturbing the root ball.
• Use a fine, well-drained seedling mix and keep it evenly moist, not waterlogged.
• Thin or space plants properly to improve airflow and reduce disease pressure.
• Water at soil level in the morning where possible, especially in humid periods.
• Deadhead or pick stems regularly to prolong flowering.

Brought to you by Ubuntuberg Seeds, where our mission is to cultivate humanity & harvest unity. Ubuntuberg Seeds: the highest quality seed stock in all of Southern Africa, sourced from sustainable farms, guaranteeing you the best quality seed stock.