Meconopsis simplicifolia (Sikkim poppy) — Rosette-forming with tall upright flower stems

Overview

Meconopsis simplicifolia is a rosette-forming with tall upright flower stems perennial in the genus Meconopsis, part of the Papaveraceae family, with deciduous; hairy, toothed or lobed basal rosettes, sometimes bronze-tinted foliage. Meconopsis simplicifolia grows best in partial shade; needs shelter from hot sun, and tolerates most soils and acid to neutral; dislikes lime pH. Its UK hardiness is rated H6-H7. It is native to Central Nepal and Southeastern Tibet.

About

Meconopsis simplicifolia is a perennial rosette-forming poppy with tall, upright flower stems. It bears deciduous, hairy basal leaves that are toothed or lobed and can show a bronze tint. Flowers appear from May to July. It performs best in partial shade on cool, humus-rich, acid to neutral soil and needs shelter from hot sun.

Wikipedia contributors, CC BY-SA 4.0 — Meconopsis simplicifolia

About the genus

Meconopsis is a genus of flowering plants in the poppy family Papaveraceae. It was created by French botanist Viguier in 1814 for the species known by the common name Welsh poppy, which Carl Linnaeus had described as Papaver cambricum. The genus name means "poppy-like".

Wikipedia contributors, "Meconopsis", CC BY-SA 4.0 — Meconopsis

In the garden

Meconopsis simplicifolia, commonly called the Sikkim poppy, is a perennial in the poppy family native to central Nepal and southeastern Tibet. It forms a basal rosette of hairy, toothed or lobed leaves—sometimes bronze-tinted—and sends up tall, leafless flower stems in late spring and early summer (May to July). Choose a sheltered north- or east-facing site that receives partial shade and is protected from strong sun. Plant in deep, humus-rich, leafy loam that remains reliably moist and cool yet drains freely; the species dislikes lime and prefers acid to neutral soil. Its UK hardiness is H6–H7, which means it is very hardy to fully hardy in most British gardens provided roots stay cool. Place Meconopsis simplicifolia where its upright flowering stems can be seen above low ground cover—a cool woodland border, the shaded rear of an herbaceous bed or beneath deciduous trees are suitable spots. Give it a consistently cool, sheltered position and it will reward you with its seasonal display through May to July.

Growing conditions

Best soil and position for Meconopsis

Sunlight: Partial shade; needs shelter from hot sun
Soil type: Deep, humus-rich, leafy loam
Soil pH: Acid to neutral; dislikes lime
Soil moisture: Reliably moist and cool, yet freely draining
Aspect: North or east facing
Exposure: Sheltered
UK hardiness: H6-H7

Plant details

Meconopsis simplicifolia size, habit and characteristics

Plant type: Perennial
Habit: Rosette-forming with tall upright flower stems
Foliage: Deciduous; hairy, toothed or lobed basal rosettes, sometimes bronze-tinted
Native to: Central Nepal, Southeastern Tibet

Care notes

Pruning and caring for Meconopsis simplicifolia

Cultivation: These are plants for cool, damp, sheltered gardens with acid soil, and they are genuinely difficult where summers are hot and dry. Provide deep leafy soil, constant moisture at the root, shade from midday sun and shelter from drying wind. Mulch each spring with leaf mould and never let them bake. Check whether a given species is monocarpic before relying on it as a permanent feature, and remove flower buds in the first year to help young plants establish.
Pruning: Deadhead perennial kinds promptly to conserve energy and discourage them from behaving as annuals. Leave a few heads on monocarpic species if seed is wanted, then clear the dead plant.
Propagation: Divide perennial species immediately after flowering. Sow seed fresh in autumn or late winter in a cold frame, as viability falls quickly - this is the only route for the monocarpic species.
Pest resistance: Slugs and snails are a serious threat to the emerging rosettes; aphids infest flower stems.
Disease resistance: Downy mildew and botrytis affect plants in stagnant air, and root rot follows waterlogging over winter.

Frequently asked questions

How do I grow Meconopsis simplicifolia?

These are plants for cool, damp, sheltered gardens with acid soil, and they are genuinely difficult where summers are hot and dry. Provide deep leafy soil, constant moisture at the root, shade from midday sun and shelter from drying wind. Mulch each spring with leaf mould and never let them bake. Check whether a given species is monocarpic before relying on it as a permanent feature, and remove flower buds in the first year to help young plants establish.

Where is the best place to plant Meconopsis simplicifolia?

Meconopsis simplicifolia prefers partial shade; needs shelter from hot sun. It suits sheltered positions.

What soil does Meconopsis simplicifolia need?

Meconopsis simplicifolia is adaptable and grows happily in most soil types, including deep, humus-rich and leafy loam. It prefers acid to neutral; dislikes lime soil. Aim for soil that stays reliably moist and cool to yet freely draining.

How do I prune Meconopsis simplicifolia?

Deadhead perennial kinds promptly to conserve energy and discourage them from behaving as annuals. Leave a few heads on monocarpic species if seed is wanted, then clear the dead plant.

Is Meconopsis simplicifolia hardy in the UK?

Meconopsis simplicifolia has an RHS hardiness rating of H6, meaning it is very hardy, tolerating -20 to -15°C across most of the UK.

How do I propagate Meconopsis simplicifolia?

Divide perennial species immediately after flowering. Sow seed fresh in autumn or late winter in a cold frame, as viability falls quickly - this is the only route for the monocarpic species.

More in the Meconopsis genus

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