TWINSPUR

FAMILY: Scrophulariaceae | GENUS: DIASCIA

TYPE
  • Annuals
  • Perennials
SUN EXPOSURE
  • Partial Shade
WATER
  • Moderate Water
  • Regular Water

Plant Details

South African natives related to snapdragon (Antirrhinum), bearing spikelike clusters of blossoms at stem ends from spring through early summer and often into fall. They go dormant in hot summers. Flowers are coral to purplish pink, about inches across, with two prominent spurs on the back; these spurs produce oils attractive to pollinating bees. Leaves of most types are medium green, heart shaped, from inches to 1 inches long. Not browsed by deer.

Twinspurs are at their best in rock gardens, borders, and containers. With the exceptions noted, all of the species listed here are perennial, though these perennials may die in winter if planted in heavy, wet soil. Shear back after bloom.

diascia barberae

  • Annual.
  • Zones US, MS, LS, CS, TS; USDA 6-11.
  • Mat-forming plant to 10 inches tall, 20 inches wide, with rose-pink blossoms.
  • Blackthorn Apricot bears apricot-colored flowers.
  • Ruby Field, to 10 inches high and 2 feet wide, bears salmon-pink blossoms and has a long bloom season.
  • Selections in the Diamonte series are more compact and full-foliaged, grow about 12 inches high, and come in a range of colors.

diascia fetcaniensis

  • Zones LS, CS; USDA 8-9.
  • To 10 inches high and 20 inches wide, with rose-pink blooms.

diascia hybrids

  • Zones LS, CS; USDA 8-9.
  • More show up every year.
  • Plants in the Flying Colors series have large flowers in shades of red, pink, apricot, and coral; most grow to 612 inches high (some grow upright, others are more trailing).

A group of newer hybrids from England (all to 710 inches high and 1 feet wide) includes coral-pink 'Coral Belle'; 'Little Charmer', pink with dark red eye; soft pink 'Little Dancer'; rosy red 'Red Ace'; and deep pink 'Strawberry Sundae'.

Sundiascia series has shown more heat tolerance than any other series trialed. Upright growers to 15 inches tall and available in 'Blush Pink', 'Orange' and 'Rose Pink'.

Whisper series is a group of annual hybrids. These compact, heat-resistant plants grow 810 inches high, spreading to about 2 feet wide, and bear long-blooming, pansylike flowers. Selections include 'Apricot', 'Cranberry Red', 'Lavender Pink', and 'Salmon Red'.

diascia integerrima

  • Zones LS, CS; USDA 8-9.
  • To 1 12 feet tall, creeping to 34 feet wide.
  • Narrow leaves to 1 inches long; loose spikes of rich purplish pink flowers.
  • Coral Canyon grows 1215 inches high and 1 feet wide, bears salmon-pink blooms.

diascia rigescens

  • Zones MS, LS, CS; USDA 7-9.
  • Sprawling stems form a clump to 1 feet tall, 2 feet wide, turn up at ends to display 6- to 8 inches spikes of rich pink flowers.
  • Cut out old stems.

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