Chrysanthemum coronarium Primrose Gem - Thompson & Morgan - 43731

You’ll love the gorgeous primrose 'button' flowers of Chrysanthemum coronarium 'Primrose Gem', whi...

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Designed for gardeners looking to add soft, textured color to cottage-style borders, the Chrysanthemum coronarium 'Primrose Gem' offers petite, pale yellow daisy-like blooms with distinct golden centers. This variety is valued for its compact, dome-shaped habit and attractive ferny foliage, making it a perfect choice for sun-drenched garden spots; however, gardeners should note that it requires protection from frost and thrives best in well-drained soil.

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Model Part Number43731
BrandThompson & Morgan

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FAQs

When is the best time to sow Primrose Gem?

You can sow them indoors in early spring or directly outdoors in mid-spring once the soil has warmed.

How deep should I plant the seeds?

Sow 1.5mm deep for indoor trays and 6mm deep if sowing directly outdoors.

Can I grow these in containers?

Yes, their compact 45cm height makes them excellent candidates for containers or pots in sunny areas.

Do I need to protect them from frost?

Yes, they are not frost-hardy. Always harden them off for 10-15 days and only plant out after the final risk of frost has passed.

How much space does each plant need?

Space your plants approximately 30cm apart to ensure good air circulation and room for their 40cm spread.

Are these plants perennial?

Chrysanthemum coronarium is typically grown as an annual in many climates, providing a vibrant show from June to August.

Troubleshooting

Seeds failing to germinate

Check that the soil temperature is maintained between 18-21C and ensure the compost remains consistently moist but not waterlogged.

Plants appearing spindly

This often indicates insufficient light. Ensure the seedlings are kept in the brightest available position once they emerge.

Aphid infestation

Consider planting chives nearby as a companion to naturally deter aphids, or manually remove pests with a light stream of water.

Pros and Cons

Pros

  • Compact, dome-shaped habit keeps borders tidy
  • Beautiful contrasting yellow color profile
  • Adds soft texture with unique fern-like foliage
  • Suitable for container or border cultivation

Cons

  • Not frost-hardy; requires careful hardening off
  • Requires well-drained soil to thrive
  • Short blooming window confined to summer months

Setup, Compatibility & Care

For indoor sowing, start in early spring using a high-quality seed compost. Plant seeds 1.5mm deep, keeping the compost moist and covering with a polythene bag to retain humidity. Germination typically occurs within 10-18 days at temperatures between 18-21C. For outdoor sowing, wait until mid-spring and plant 6mm deep directly where they are to flower. When seedlings are large enough to handle, move them into containers or boxes in cooler conditions. Crucially, perform a 10-15 day hardening-off period before transplanting them to their final sunny, well-drained position after all frost risks have passed. Space plants 30cm apart for optimal airflow.