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Nierembergia

Botanical Name
Nierembergia
Hardiness
Zones 7 to 10, grown as an annual elsewhere
Height
6 to 12 inches
Width
6 to 12 inches
Flowers
Summer: blue, violet, white
Light
Full sun to part shade
Soil
Moist, well-drained, rich in organic matter
Planting & Care
  • Provide consistent moisture
  • Nierembergia benefits from light shade if grown in hot and dry climates
  • Best flowering occurs in cool summer climates
  • Mulch soil with a layer of organic matter to retain soil moisture and keep soil cool
  • Sow seeds directly outdoors a few weeks before the last frost date or indoors 8-10 weeks before last spring frost
  • Pinch plants for fuller growth
  • Deadhead for repeated bloom
  • Cut plants back during mid summer heat if flowering has declined, this will encourage flowering later in the season
  • Stem cuttings can be taken later in the season for overwintering indoors
Problems
None serious
Varieties
  • Monte Blanc - white flowers, 6" tall, 1993 AAS Winner
  • Purple Robe - violet blue flowers, 8"
  • Regal Robe - deep purple flowers, 6"

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