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Overwintering Mandevilla (Dipladenia) in Zone 5b Ontario

Mandevilla (formerly Dipladenia) is not hardy in zone 5b. Grow in a pot; bring indoors before frost. Place in bright east/south window, water sparingly (every 10–14 days), no fertilizer. It will drop leaves and look sparse. In spring, harden off in shade 10 days, then full sun; resume watering and feeding with balanced fertilizer.

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