Alstroemeria Summer Heat ('Tessumheat') (Summer Paradise - Summer Series)

RHS Plant Profile
Peruvian lily [Summer Heat]

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Synonyms

Alstroemeria 'Tessumheat'

Plants for pollinators
Herbaceous Perennial
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A compact, clump-forming perennial, to 40cm tall and wide, with dark-to-mid green, lance-shaped leaves. Clusters of buds open to tomato-red and yellow funnel-shaped flowers, with tiny black flecks on the inner petals. Flowers appear from late spring through summer and into early autumn if regularly dead-headed

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

Chalk Loam Sand
Moisture
Moist but well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
East–facing or South–facing or West–facing
Exposure
Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

  • H1A: under glass all year (>15C)
  • H1B: can be grown outside in the summer (10 - 15)
  • H1C: can be grown outside in the summer (5 - 10)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
  • H4: hardy through most of the UK (-10 to -5)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
  • H6: hardy in all of UK and northern Europe (-20 to -15)
  • H7: hardy in the severest European continental climates (< -20)
H4

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Alstroemeriaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming, Spreading branched
Genus
Alstroemeria are fleshy rooted herbaceous perennials forming spreading clumps of erect stems bearing narrowly lance-shaped leaves, with umbels of showy funnel-shaped flowers in summer
Name Status
Trade

How to Grow

Cultivation

Grow in fertile, moist but well-drained soils in full sun ideally. Young plants are best left undisturbed to form clumps; mulch for the first two winters. See also Alstroemeria cultivation

Propagation

Propagate by division in late summer and early autumn or very early spring

Suggested planting locations and garden types

  • Cottage and informal garden
  • Patio and container plants
  • Sub-tropical
  • Wildlife gardens
  • Cut flowers
  • Flower borders and beds

Pruning

Carefully but confidently tug, and pull out any spent flower spikes at the base of the plant. This stimulates a new flower spike to develop from the tuber of the alstroemeria plant

Pests

May be susceptible to slugs

Diseases

Generally disease-free but may be susceptible to a virus