• Informal decorative
  • Perennial
  • Zones 9–11
  • Apricot
  • Double

Penhill Watermelon

Penhill Watermelon Dinnerplate

Perennial informal decorative dahlia in apricot, pink, lavender, and yellow, blooming in midsummer, late summer, and fall. An informal decorative dinnerplate dahlia with shaggy blooms of 10 inches or more in a blend of peach, pink, lavender and a hint of yellow. USDA zones 9–11.

Single source · Values marked like this (estimated) are estimates.

Buy from $8.30

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A Penhill Watermelon dahlia flower up close on the plant
A Penhill Watermelon dahlia flower up close on the plant

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Penhill Watermelon dahlia plants in bloom in a garden
Penhill Watermelon dahlia plants in bloom in a garden

At a glance

Flower form
Informal decorative Double · Large (dinnerplate) · 10 in (25 cm) (estimated)
Colors
  • Apricot
  • Pink
  • Lavender
  • Yellow
Blend
Blooms
Midsummer, Late summer, Fall 80–100 days from planting
Vase life
5 days
Height
3½–4 ft (102–122 cm)
Sunlight
Full sun
Hardiness
USDA zones 9–11 Perennial

Lift or treat as an annual below zone 9.

Planted as
Tuber
Botanical name
Dahlia hybrid

In the garden

  • Occasionally severely damaged by deer (Rutgers rating)

Find your frost dates and zone by ZIP code

Origin

One of the Penhill series of dinnerplate dahlias, grown for very large, frilly blooms.

Sources

Where to buy

Prices rechecked daily
  • DutchGrownBulbs

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    $8.30Checked Oct 14, 2026
  • White Flower FarmBulbs

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    $13.00Checked Oct 14, 2026
  • Longfield GardensBulbs

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    $18.50Checked Oct 14, 2026

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All photos

  • A Penhill Watermelon dahlia flower up close on the plant
    A Penhill Watermelon dahlia flower up close on the plant
  • Penhill Watermelon dahlia plants in bloom in a garden
    Penhill Watermelon dahlia plants in bloom in a garden

Questions

Is Penhill Watermelon hardy in my zone?

Penhill Watermelon survives winter in the ground in USDA zones 9 to 11. In colder zones treat it as an annual or lift it before the ground freezes.

Does Penhill Watermelon need full sun?

Penhill Watermelon grows in full sun.

When does Penhill Watermelon bloom?

Penhill Watermelon blooms in midsummer, late summer, and fall, about 80–100 days from planting.

Is Penhill Watermelon good for cutting?

Yes. Cut stems of Penhill Watermelon last about 5 days in a vase.