Growing Nierembergia Plants Germination takes two to four weeks in warm temperatures. Keep in mind that Nierembergia cupflowers require rich, well-drained soil. The plant generally tolerates full sunlight or partial shade. However, if you live in a hot climate, direct afternoon sunlight may be too intense.
How do you grow Nierembergia?
Start Nierembergia from seed sown indoors 8-10 weeks before your date of average last frost. Barely cover the seed; it should germinate within 2-3 weeks at 70°F. Keep moist until emergence, then the plants can be kept on the dry side. Young plants grow very slowly, but grow more quickly once transplanted.
Is white cup flower a perennial?
Nierembergia x 'Sunnikoho' PPAF
This versatile, fast-growing, tender perennial offers masses of papery-white blooms from April through November.
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