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Achimenes mexicana

Mexican hot water plant

A dwarf, bushy, rhizomatous perennial to 20cm with toothed, dark green leaves. Bright blue-purple, tubular-shaped flowers with speckled yellow eyes are produced from summer through to the autumn

Synonyms
Achimenes 'Mexicana'
Achimenes scheeri

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Size
Ultimate height
0.1–0.5 metres
Time to ultimate height
1 year
Ultimate spread
0.1–0.5 metres
Growing conditions
Loam
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Blue Purple Green
Autumn Blue Purple Green
Winter
Position
  • Full sun
  • Partial shade
Aspect

East–facing or South–facing or West–facing

Exposure
Sheltered
Hardiness
H1C
Botanical details
Family
Gesneriaceae
Native to GB / Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus

Achimenes are rhizomatous herbaceous perennials with scaly rhizomes producing trailing stems bearing simple, opposite or whorled leaves and salver-shaped showy flowers in the leaf axils in summer and autumn

Name status

Correct

How to grow

Cultivation

Grow under glass in either peat-free, multi-purpose compost or peat-free John Innes No 2 loam-based compost in bright filtered light. To bring rhizomes into growth in spring, temperatures of 16-18°C (61-64°F) are ideal. Water sparingly until summer when plants should be watered freely. Apply a balanced liquid fertiliser at quarter strength at each watering

Propagation

Propagate by division of rhizomes in spring or stem tip cuttings in spring. See softwood cuttings for further advice

Suggested planting locations and garden types
  • hanging basket
  • Patio and container plants
  • Sub-tropical
  • Conservatory and greenhouse
Pruning

No pruning required

Pests

May be susceptible to aphids, glasshouse red spider mite and thrips

Diseases

Generally disease-free

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