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Hardy perennial
Saxifrage family
Perennials
Astilbe 'Amethyst'
Astilbe
Astilbe 'Amethyst': 80 cm high and 50 cm spread, sun to partial shade. Violet flowers in July-August. Zone 3; choose soil compatible with its moisture needs.
- Exposure
- Sun to partial shade
- Life cycle
- Hardy perennial
- Hardiness
- Zone 3
Discover the plant
Common nameAstilbe 'Amethyst'
FamilySaxifrage family
GenusAstilbe
CultivarAmethyst
TypeHardy perennial
Botanical nameAstilbe
Astilbe 'Amethyst' (Astilbe 'Amethyst') brings a palette of purple to the garden. The foliage has shades of green, to be highlighted among different textures. The usual flowering period is July-August. At maturity, expect 80 cm in height and 50 cm in width, which suggests its use in the middle of a flowerbed and in group plantings.
To plant Astilbe 'Amethyst', look for the following exposure: sun to partial shade and suitable soil (kept moist, Clayey). For Astilbe 'Amethyst', 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 (sun to partial shade) does not eliminate the need for water. A spacing of about 50 cm between centers is a starting point, to be adjusted according to observed vigor. The indicated hardiness zone is zone 3, to be assessed according to your garden's conditions.
When planting Astilbe 'Amethyst', monitor watering during hot weather and remove old stems when the clump regrows in spring. Drying out of the root ball shortens the astilbe's flowering and can cause the edges of the leaves to brown. For associations, consider daylilies, campanulas, and perennial geraniums in varieties with similar needs. By composing around its volume of 80 cm by 50 cm, you will preserve the visibility of its flowering (July-August) and the circulation between plants.
Planting guide
From planting to establishment.
Spacing / density
50 cm
Best planting time
Spring after the thaw or early autumn, allowing the roots to settle before the severe cold.
Propagation
Division of clumps. Sowing does not guarantee the fidelity of a named cultivar.
Growing method
Astilbe ‘Amethyst’: In spring after the ground thaws, or in early autumn, allowing the roots time to establish before the cold weather sets in. For Astilbe ‘Amethyst’, regularly check the soil around the root ball: it must remain moist. Water at the base when the surface begins to dry out and adjust watering according to rainfall; this exposure (sun to partial shade) does not eliminate the need for water. Drying out of the root ball shortens the astilbe's flowering period and can cause the leaf edges to turn brown.
Soil and care
The right care,at the right time.
Soil pH
Acid to neutral to alkaline; general indication of the botanical group
Care level
Regular maintenance
Watering
For Astilbe 'Amethyst', 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 amount of water according to rainfall; this exposure (sun to partial shade) does not eliminate the need for water.
Soil type
Kept moist, Clayey
Fertilization
Fertilizer for flowering
Moisture
Regular freshness during growth
Seasonal care
Astilbe 'Amethyst': monitor watering during hot spells and remove old stems when the clump regrows in spring. During its flowering period (July-August), also keep an eye on damaged stems and neighboring plants that could obscure the clump.
Container growing
A garden,within reach.
Recommended pot size
Stable and perforated container, significantly wider than the root ball; size to be adapted to the format sold and to the adult development.
To try Astilbe ‘Amethyst’ in a container, choose a stable pot with drainage holes, suitable for the root ball and its future size (50 cm). The substrate must remain moist; it will dry out faster than in the ground. Plan to protect the container in winter depending on your climate.
Bloom and dimensions
Its place,in your garden.
Mature height
31.5 in
Width / spread
50 cm
Flower color
Purple
Foliage color
Green
Foliage type
Lapsed
Growth rate
Moderate
Growth habit
Erected
Fragrance
Not documented for this selection
Bloom period
July-August
Garden associations
In goodcompany.
Companion plants
Associations to consider for Astilbe ‘Amethyst’: daylilies, campanulas, perennial geraniums. Choose varieties that tolerate sun to partial shade and comparable moisture; allow each clump its adult space.
Plants to avoid
Around Astilbe 'Amethyst', especially avoid neighboring plants that would cover its leaves or strongly compete with its root ball. Compatibility in terms of light, water, and spread takes precedence over a list of so-called enemy plants.
Frequently asked questions
Your questions,answered.
Where to plant Astilbe 'Amethyst'?
Expect sun to partial shade and suitable soil (kept moist, Clayey). Drying out of the root ball shortens the flowering period of astilbes and can cause the leaf edges to brown.
Where should I plant Astilbe ‘Amethyst’?
Expect it to reach about 80 cm in height and 50 cm in width when mature. Plant approximately 50 cm apart, center to center, adjusting according to the actual development of the clump. This size is suitable for use in the middle of a flower bed and for group plantings.
When does Astilbe 'Amethyst' bloom?
The indicated period is July-August. The flower color is purple. The exact date and duration depend on the climate, season, and plant establishment.
How to Water and Care for Astilbe 'Amethyst'?
For Astilbe 'Amethyst', regularly check the soil around the root ball: it must remain moist. Water at the base when the surface starts to dry and adjust the amount of water given according to rainfall; this exposure (sun to partial shade) does not eliminate the need for water. Monitor watering during hot spells and remove old stems when the clump regrows in spring.
Can Astilbe 'Amethyst' be grown in a pot?
To try Astilbe ‘Amethyst’ in a container, choose a stable pot with drainage holes, suitable for the root ball and its future size (50 cm). The substrate must remain moist; it will dry out faster than in the ground. Plan to protect the container in winter depending on your climate.
Wildlife and pets
Life,around your plants.
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