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Meconopsis grandis Seeds - Blue Poppy

Meconopsis grandis
Blue Poppy, Himalayan blue Poppy

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Régis Q., 25/05/2020

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More information

This perennial spectacle is part of the mystical tribe of Himalayan blue poppies. It displays large poppy-like flowers in spring and summer, with a vibrant gentian blue colour, often shaded with purple at the base of the petals centred around a golden stamen heart. This is the least demanding and most perennial of them all. As such, it is well worth attempting to sow it in humus-rich and moist soil, in the shelter of woodland, in dappled light.
Flower size
10 cm
Height at maturity
80 cm
Exposure
Partial shade
Annual / Perennial
Perennial
Germination time (days)
60 days
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Sowing period February to March, September to November
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Flowering time May to June
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Description

Meconopsis grandis, also known as the Himalayan Blue Poppy, is a spectacular perennial plant belonging to the mythical tribe of blue poppies from the Himalayas. In spring and summer, it produces large poppy-like flowers of a very bright gentian blue, often shaded with purple at the base of the petals centred around a heart of golden stamens. The flowers are borne by elegant and sturdy stems above fairly light, velvety green foliage. This is the least demanding and most perennial of all. As such, it deserves an attempt at sowing it in humus-rich and moist soil, in the shelter of undergrowth, in filtered light.

 

Originally from China, in the northwest of Yunnan Province, and southeast Tibet, the blue poppy grows at an altitude of 3000 to 4000m (9842 to 13123ft). It grows in shaded and humid places, in neutral, humus-rich, and deep soil. It is a hardy perennial plant, but quite often semelparous (it tends to wither after flowering) with rapid growth, showing a rosette habit from which emerge floral stems at least 80cm (32in) tall. The basal rosette, with a diameter of 40 to 50cm (16 to 20in), is composed of oblong and ovate leaves, of a fairly light green colour, covered with rust-coloured hairs. The leaves are marked with a central vein, and are alternate. The floral stems present several flowers grouped in racemes, with a diameter of 10 to 12cm (4 to 5in). The crumpled petals have a slightly translucent and silky texture. They are gentian blue, often washed with purple towards the base of the petals. At maturity, their golden centre is composed of an ovary with a short stem surrounded by a collar of white stamens when they are juveniles. Flowering is followed by the formation of brown capsules filled with small black seeds. This plant generally does not flower in the first year if sown too late.

 

Less difficult to maintain in our gardens than Meconopsis betonicifolia, the blue poppy is more perennial, but as hardy and prolific as the latter. To give yourself the best chance of growing it, find the coldest spot in your garden, at the foot of a wall to the east or north, in well-drained and loose soil, or at the edge of woodland exposed to the morning sun. Plant it in large masses, give it space and let nature take its course. Meconopsis grandis seems to be easier to grow in cool and humid climates in summer, such as temperate coastal zones with the oceanic influence. It should be kept in mind that this plant experiences summer monsoons in Tibet and is covered in snow during winter.

Flowering

Flower colour blue
Flowering time May to June
Inflorescence Solitary
Flower size 10 cm
Bee-friendly Attracts pollinators

Foliage

Foliage persistence Annual
Foliage colour green

Plant habit

Height at maturity 80 cm
Spread at maturity 30 cm
Growth rate normal

Botanical data

Genus

Meconopsis

Species

grandis

Family

Papaveraceae

Other common names

Blue Poppy, Himalayan blue Poppy

Origin

Himalayas

Product reference10111

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Planting and care

Sow Meconopsis seeds from February to June or from September to October. Place the seeds on the surface of good, well-draining and fine compost, and cover with a very thin sprinkle of compost or vermiculite. Enclose the sowing in a transparent plastic bag and place it outside in a mini-greenhouse or a sheltered area. Keep the substrate moist and protect it from rain, but not from frost. Germination can take from 1 to 3 months.

Once the seedlings have emerged, place them in a room at 10 to 15°C (50 to 59°F), no more. Water carefully to avoid damping off, caused by the development of a pathogenic fungus in overly wet and warm conditions.

Transplant the seedlings into 7.5cm (3in) diameter pots once they have developed 2 true leaves. Place the pots in a cooler location, in dappled sunlight. When the plants reach a height of 45cm (18in), transplant them into the garden, in deep, loamy, moist to wet soil, in a partially shaded position sheltered from strong winds.

Cultivation:

To successfully cultivate it, the environment in which it will be planted must be cool with plenty of humidity in the air. The soil must also be consistently moist, but always well-drained. It must be remembered that this plant originates in the mountains, where the soil is always drained by the underlying rock. A mixture of clay soil, leaf compost, and gravel in equal parts suits it very well. It does not tolerate limestone or heat, which is why it is so difficult to cultivate it outside of temperate coastal areas influenced by the ocean.

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Sowing period

Sowing period February to March, September to November
Germination time (days) 60 days

Intended location

Suitable for Woodland edge, Undergrowth
Type of use Border
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Ease of cultivation Experienced
Exposure Partial shade
Soil pH Neutral
Soil moisture Moist soil, Well-draining, rich, humus-bearing, light
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