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Hardy perennial
Asparagaceae
Perennials
Hosta 'Osiris Blue Night'
Hosta
Hosta ‘Osiris Bleu Nuit’: 105 cm tall and 180 cm spread, partial to full shade. Purple flowers in July. Zone 3; choose soil compatible with its moisture needs.
- Exposure
- Partial shade to full shade
- Life cycle
- Hardy perennial
- Hardiness
- Zone 3
Discover the plant
Common nameHosta 'Osiris Blue Night'
FamilyAsparagaceae
GenusHosta
CultivarOsiris Midnight Blue
TypeHardy perennial
Botanical nameHosta
Hosta ‘Osiris Bleu Nuit’, known in the garden as Hosta ‘Osiris Bleu Nuit’, combines violet-toned blooms with a volume that is easy to place in the composition. The foliage displays shades of green, which can be highlighted among different textures. The usual flowering period is in July. At maturity, expect 105 cm in height and 180 cm in width, which guides its use in partial shade beds and woodland gardens. The relief of the leaves provides visible texture even between blooms.
Soil choice is essential for Hosta ‘Osiris Bleu Nuit’: keep it moist, Clay. The preferred exposure is partial shade to shade. For Hosta ‘Osiris Bleu Nuit’, regularly check the soil around the root ball: it must remain fresh. Water at the base when the surface begins to dry and adjust watering according to rainfall; this exposure (partial shade to shade) does not eliminate water requirements. A spacing of approximately 180 cm between centers serves as a starting point, to be adjusted according to observed vigor. The indicated hardiness zone is 3, to be evaluated according to your garden conditions.
To maintain the appeal of Hosta ‘Osiris Bleu Nuit’ after flowering, monitor for slugs on new leaves and wait for complete yellowing before removing foliage at the end of the season. Under trees, neighboring roots can dry out the soil despite the shade; check the moisture level of the hosta's root ball. For companion planting, consider pulmonarias, astilbes, and tiarellas in varieties with similar needs. The flowering (July) and spread of 180 cm will serve as benchmarks for arranging other plants around this plant.
Planting guide
From planting to establishment.
Spacing / density
180 cm
Best planting time
Spring after the thaw or early autumn, allowing the roots time to settle before the severe cold sets in.
Propagation
Division of clumps. Seedlings do not guarantee the fidelity of a named cultivar.
Growing method
Hosta ‘Osiris Bleu Nuit’: In spring after the thaw or early autumn, allowing the roots time to establish before the severe cold. For Hosta ‘Osiris Bleu Nuit’, regularly check the soil around the root ball: it should remain moist. Water at the base when the surface begins to dry and adjust watering according to rainfall; this exposure (partial to full shade) does not eliminate the need for water. Under trees, neighboring roots can dry out the soil despite the shade; check the moisture level at the hosta's root ball.
Soil and care
The right care,at the right time.
Soil pH
Acid to neutral; general indication of botanical group
Care level
Regular maintenance
Watering
For Hosta ‘Osiris Blue Night’, regularly check the soil around the root ball: it must remain moist. Water at the base when the surface starts to dry out and adjust the water supply according to rainfall; this exposure (partial to full shade) does not eliminate the need for water.
Soil type
Kept moist, Clayey
Fertilization
Fertilizer for flowering
Moisture
Regular freshness during growth
Seasonal care
Hosta ‘Osiris Bleu Nuit’: watch out for slugs on new leaves and wait for the foliage to completely yellow before removing it at the end of the season. During its flowering period (July), also check for damaged stems and neighboring plants that might obscure the clump.
Container growing
A garden,within reach.
Recommended pot size
A stable, perforated container, significantly wider than the root ball; size to be adapted to the format sold and the adult development.
To try Hosta ‘Osiris Bleu Nuit’ in a container, choose a stable pot with drainage holes, suitable for the root ball and its future size (180 cm). The substrate must remain moist; it will dry out more quickly than in open ground. Plan to protect the container in winter depending on your climate.
Bloom and dimensions
Its place,in your garden.
Mature height
3.5 feet (1.07 m)
Width / spread
5.9 feet (1.81 m)
Flower color
Purple
Foliage color
Blue
Foliage type
Lapsed
Growth rate
Moderate
Growth habit
Tuft of arching leaves
Fragrance
Not documented for this selection
Bloom period
July
Garden associations
In goodcompany.
Companion plants
Associations to consider for Hosta ‘Osiris Bleu Nuit’: lungworts, astilbes, foamflowers. Choose varieties that tolerate partial to full shade and comparable humidity; ensure adequate space for each mature clump.
Plants to avoid
Around Hosta 'Osiris Bleu Nuit', particularly avoid neighbors that would cover its leaves or strongly compete with its root ball. Compatibility in terms of light, water, and size takes precedence over a list of so-called enemy plants.
Frequently asked questions
Your questions,answered.
Where to plant Hosta 'Osiris Bleu Nuit'?
Provide partial to full shade and suitable soil (kept moist, clayey). Under trees, nearby roots can dry out the soil despite the shade; check the moisture level of the hosta's root ball.
Where should I plant Hosta ‘Osiris Bleu Nuit’?
Expect a height of approximately 105 cm and a width of 180 cm at maturity. Allow about 180 cm between centers, to be adjusted according to the actual development of the clump. This size is suitable for use in a semi-shaded bed and woodland garden.
When does Hosta 'Osiris Bleu Nuit' bloom?
The period indicated is July. The flower palette is purple. The exact date and duration depend on the climate, the season, and the plant's establishment.
How to water and care for Hosta ‘Osiris Bleu Nuit’?
For Hosta ‘Osiris Bleu Nuit’, regularly check the soil around the root ball: it must remain moist. Water at the base when the surface starts to dry out and adjust the watering according to rainfall; this exposure (partial to full shade) does not eliminate the need for water. Watch for slugs on new leaves and wait for the foliage to fully yellow before removing it at the end of the season.
Can Hosta 'Osiris Bleu Nuit' be grown in a pot?
To try Hosta ‘Osiris Blue Night’ in a container, choose a stable pot with drainage holes, suited to the root ball and its future size (180 cm). The substrate should remain moist; it will dry out faster than in the ground. Plan to protect the container in winter depending on your climate.
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