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Hardy perennial
Lythraceae
Perennials
Purple Loosestrife 'Robert'
Purple loosestrife
Purple Loosestrife ‘Robert’: 80 cm tall and 45 cm spread, sun to partial shade. Pink, purple flowers in June-September. 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 namePurple Loosestrife 'Robert'
FamilyLythraceae
GenusPurple Loosestrife
Speciespurple loosestrife
CultivarRobert
TypeHardy perennial
Botanical namePurple loosestrife
With Lythrum salicaria 'Robert', the flowerbed welcomes a plant whose flowers display shades of pink and purple. The foliage features green nuances, to be highlighted among different textures. The usual flowering period is June-September. Its size of 80 cm by 45 cm reserves it a place in the middle of the flowerbed and for group planting, without forgetting the space of its neighbors.
The success of Purple Loosestrife 'Robert' begins with its location: sun to partial shade, in suitable soil (humus-rich, retaining its freshness during growth, without stagnant water around the crown). For Purple Loosestrife 'Robert', regularly check the soil around the root ball: it should 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 water requirements. A margin corresponding to its spread of 45 cm avoids having to move the clump in the first seasons. The hardiness zone indicated is zone 3, to be assessed according to your garden's conditions.
To maintain the interest of Purple Loosestrife 'Robert' after flowering, keep the foliage healthy after blooming to allow the plant to continue its growth. Keep the crown clear and observe new growth before removing damaged parts. For companion planting, consider daylilies, coneflowers, and campanulas in varieties with similar needs. By composing around its volume of 80 cm by 45 cm, you will preserve the visibility of its blooms (June-September) and circulation between plants.
Planting guide
From planting to establishment.
Spacing / density
17.7 inches
Best planting time
Spring after the thaw or early autumn, allowing the roots to establish before the cold weather sets in.
Propagation
Division of clumps; stem cuttings. Sowing does not guarantee the fidelity of a named cultivar.
Growing method
Salicaria ‘Robert’: Spring after the thaw or early autumn, allowing time for the roots to establish before the cold weather sets in. For Salicaria ‘Robert’, 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 watering according to rainfall; this exposure (sun to partial shade) does not eliminate the need for water. Keep the crown clear and observe new growth before removing damaged parts.
Soil and care
The right care,at the right time.
Care level
Regular maintenance
Watering
For Purple Loosestrife 'Robert', 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 the watering according to rainfall; this exposure (sun to partial shade) does not eliminate the need for water.
Soil type
Humiferous, retaining its freshness during growth, without stagnant water around the collar
Fertilization
Fertilizer for flowering
Moisture
Regular watering during growth
Seasonal care
Purple Loosestrife 'Robert': keep the foliage healthy after flowering to allow the plant to continue growing. During its flowering period (June-September), also monitor damaged stems and neighboring plants that could hide the clump.
Container growing
A garden,within reach.
Recommended pot size
Stable, perforated container, significantly wider than the root ball; size to be adapted to the format sold and adult development.
To grow Salicaire 'Robert' in a container, choose a stable pot with drainage holes, suitable for the root ball and its future size (45 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
3 feet (91.5 cm)
Width / spread
18 inches (45.5 cm)
Flower color
Pink
Foliage color
Green
Foliage type
Deciduous in cold climates
Growth rate
Fast
Growth habit
Erected
Fragrance
Undocumented for this selection
Bloom period
June-September
Garden associations
In goodcompany.
Companion plants
Associations to consider for Salicaire 'Robert': daylilies, coneflowers, bellflowers. Choose varieties that tolerate sun to partial shade and similar humidity; allow each clump its adult space.
Plants to avoid
Around Salicaire ‘Robert’, especially avoid neighbors that would cover its leaves or strongly compete with its root ball. Light, water, and size compatibility take precedence over a list of so-called enemy plants.
Frequently asked questions
Your questions,answered.
Where to plant purple loosestrife 'Robert'?
Provide sun to partial shade and a suitable soil (humus-rich, retaining moisture during growth, without stagnant water around the collar). Keep the collar clear and observe regrowth before removing damaged parts.
What place for Salicaria 'Robert'?
Expect a height of about 80 cm and a width of 45 cm at maturity. Approximately 45 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 border and for group plantings.
When does 'Robert' Loosestrife bloom?
The indicated period is June-September. The flower palette is pink, purple. The exact date and duration depend on the climate, the season, and the plant's establishment.
How to water and care for Salicaire 'Robert'?
For Lythrum ‘Robert’, regularly check the soil around the root ball: it should 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. Keep the foliage healthy after flowering to allow the plant to continue its growth.
Can Salicaire 'Robert' be grown in a pot?
To grow Salicaire ‘Robert’ in a container, choose a stable pot with drainage holes, suitable for the root ball and its future size (45 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.
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