Californian Poppy Tree, Romneya coulteri
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Californian Poppy Tree, Romneya coulteri

Amaze your family and gardening neighbours and grow what can only be described as the biggest poppies around!
  • Rare and unusual, the Californian Tree Poppy produces voluminous, crepe-paper white poppies with golden-yellow centres.
  • Some of the largest flowers in the poppy family up to 15cm (6in) in width.
  • With its divided, grey-green leaves it's an excellent specimen plant for a sunny mixed border.
  • Awarded the RHS Award of Garden Merit and you can be sure that this is a proven garden performer.
  • Supplied as an established plant in a 2L pot, ready for immediate planting. Grows to H2.5m x W1.5m.

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2L Pot
Item: 510726
£14.99
2L Pot - Item: 510726
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Product Information

Rare and unusual, Romneya coulteri (also known as the Californian Tree Poppy) produces voluminous, crepe-paper white poppies with golden-yellow centres. Widley admired for its blooms, it begins flowering in early July and goes on until the autumn producing some of the largest flowers in the poppy family up to 15cm (6in) in width.

With its divided, grey-green leaves this native of dry coastal Californian scrubland is hardy and will die down in winter, and although slow to get established, its vigorous once its happy.

An excellent specimen plant for a sunny mixed border, Romneya is fully deserving of its coveted RHS Award of Garden Merit and you can be sure that this is a proven garden performer - you can therefore plant this in the garden with confidence, for stunning displays for many years to come.

Supplied as an established plant in a 2L pot, ready for immediate planting. Grows to H2.5m x W1.5m

What Is Supplied

Item 510726 supplied as:
Supplied as an established plant in a 2L pot, ready for immediate planting. Grows to H2.5m x W1.5m.

Plant Care Information

RHS Garden Merit
RHS Garden Merit
Plant In Sunshine
Plant In Sunshine
Winter Hardy
Winter Hardy

Top Tips

Californian Tree Poppies dislike transplanting but once established can spread, so choose your planting position carefully.

Care Information

Planting Advice for your Romneya coulteri (Californian Tree Poppy):

  • Best in full sun in fertile, well-drained soil against a warm, sunny wall protected from cold winds.
  • Dig a planting hole 3 x wider than the roots of the shrub you're planting and mix some well-rotted compost or manure with the soil from the hole and use this to re-fill once the shrub is in place.
  • We've found that a square hole is better than a round one as the new roots, once they reach the edges tend to grow in a circle round the circumference of the hole whereas when they reach the corners of a square hole, they find it easier to grow through.
  • Before planting soak container-grown shrubs thoroughly and allow to drain.
  • Remove the plant from its pot and tease out a few of the roots.
  • Add Mycorrhizal fungi to the roots when planting to help plants establish quicker.
  • Place your shrub in the hole at the same level at the pot then refill the hole with the earth removed (backfilling).
  • Firm in the soil with your heel, avoiding the root ball and water well.
  • Mulch around the base of the plant with a collar, compost, gravel, bark etc.

 

Aftercare advice for Californian Tree Poppy:

  • Keep plants well-watered while they establish.
  • Use plant supports later in the flowering season.
  • Provide a deep, dry mulch in the winter months for protection.


 

Pruning Advice for Romneya Californian Tree Poppy:

  • Cut back flower stems close to the base in March.

Planting/Flowering Calendar

Best Time To Plant
When Your Plant Will Flower
When Your Plant Will Fruit
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Fully Grown Plant Dimensions (approx)

Plant Dimensions
250 cm
150 cm
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