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Hardy perennial
Caprifoliaceae
Perennials
Knautia 'Thunder and Lightning'
Knautia
Knautia 'Thunder and Lightning': 45.5 cm tall and 51 cm spread, sun exposure. Red, purple flowers in June-September. Zone 5; choose a soil compatible with its moisture needs.
- Exposure
- Sun
- Life cycle
- Hardy perennial
- Hardiness
- Zone 5
Discover the plant
Common nameKnautia 'Thunder and Lightning'
FamilyCaprifoliaceae
GenusKnautia
CultivarThunder and Lightning
TypeHardy perennial
Botanical nameKnautia
With Knautia ‘Thunder and Lightning’, the flowerbed welcomes a plant whose flowers feature red and purple tones. Among its distinctive details: variegated foliage. The foliage has shades of green and cream, to be highlighted among different textures. The usual flowering period is June-September. The clump is approximately 45.5 cm high with a spread of 51 cm; use these dimensions to place the plant in the middle of the flowerbed and for group planting. The leaf margins contribute to the contrast and deserve a visible spot from the pathway.
Soil choice is essential for Knautia ‘Thunder and Lightning’: well-drained garden soil, maintaining moderate moisture during establishment. The preferred exposure is full sun. Support the rooting of Knautia ‘Thunder and Lightning’ with deep watering, then check the moisture before watering again. Adjust the frequency to rainfall and heat; avoid small daily applications on already moist soil. A spacing of approximately 51 cm between centers is a starting point, to be adjusted according to observed vigor. The indicated hardiness zone is zone 5, to be evaluated according to your garden conditions.
The maintenance of Knautia ‘Thunder and Lightning’ is mainly based on observing the clump: keep healthy foliage after flowering to allow the plant to continue its growth. Keep the crown clear and observe recovery before removing damaged parts. For associations, consider perennial geraniums, campanulas, and echinaceas in varieties with similar needs. The flowering (June-September) and the 51 cm spread will serve as benchmarks for distributing other plants around this plant.
Planting guide
From planting to establishment.
Spacing / density
51 cm
Best planting time
Spring after the thaw, or early autumn, allowing the roots time to establish themselves before the severe cold sets in.
Growing method
Knautia ‘Thunder and Lightning’: In spring after the ground thaws or in early autumn, allowing the roots to establish before severe cold sets in. Support the establishment of Knautia ‘Thunder and Lightning’ with deep watering, then check the moisture level before watering again. Adjust the frequency based on rain and heat; avoid small daily waterings on already moist soil. Keep the crown clear and observe new growth before removing damaged parts.
Soil and care
The right care,at the right time.
Care level
Routine maintenance
Watering
Help Knautia 'Thunder and Lightning' establish itself by watering deeply, then check the moisture before watering again. Adjust the frequency according to rainfall and heat; avoid small daily waterings if the soil is already moist.
Soil type
Drained garden soil, retaining moderate moisture during installation
Fertilization
Fertilizer for flowering
Moisture
Moderate humidity; water according to the actual state of the root ball
Seasonal care
Knautia ‘Thunder and Lightning’: keep the foliage healthy after flowering to allow the plant to continue growing. During its flowering period (June-September), also look out 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 adult development.
To try Knautia 'Thunder and Lightning' in a container, choose a stable pot with drainage holes, suitable for the root ball and its future size (51 cm). Water must drain freely after each watering; check the root ball more often than if planted in the ground. Plan to protect the container in winter depending on your climate.
Bloom and dimensions
Its place,in your garden.
Mature height
18 inches (45.5 cm)
Width / spread
20 inches (51 cm)
Flower color
Pink
Foliage color
Multicolored
Growth rate
Moderate
Growth habit
Erected
Fragrance
Not documented for this selection
Bloom period
June-September
Garden associations
In goodcompany.
Companion plants
Associations to consider for Knautia 'Thunder and Lightning': perennial geraniums, campanulas, echinaceas. Choose varieties that tolerate sun and comparable moisture; allow each clump its adult space.
Plants to avoid
Around Knautia ‘Thunder and Lightning’, especially 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 Knautia 'Thunder and Lightning'?
Provide sun and suitable soil (drained garden soil, retaining moderate moisture during installation). Keep the crown clear and observe recovery before removing damaged parts.
Where should I plant Knautia 'Thunder and Lightning'?
Expect it to reach about 45.5 cm in height and 51 cm in width at maturity. About 51 cm between centers, to be adjusted 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 Knautia 'Thunder and Lightning' bloom?
The period indicated is June-September. The flower palette is red, purple. The exact date and duration depend on the climate, season, and plant establishment.
How to water and care for Knautia 'Thunder and Lightning'?
To help Knautia 'Thunder and Lightning' establish itself, water deeply, then check the soil moisture before watering again. Adjust the frequency according to rainfall and heat; avoid small daily waterings if the soil is already damp. Keep the foliage healthy after flowering to allow the plant to continue growing.
Can Knautia ‘Thunder and Lightning’ be grown in a pot?
To try growing Knautia ‘Thunder and Lightning’ in a container, choose a stable pot with drainage holes, suitable for the root ball and its future size (51 cm). Water must drain freely after each watering; check the root ball more often than if it were planted in the ground. Plan to protect the container in winter depending on your climate.
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