Suitability of the climate for blackcurrants In winter-hardiness zone 7a and Heat Zone 7 (60-80 days above 86°F/30°C), European blackcurrants (Ribes nigrum) can survive the winters but will struggle with the summer heat and humidity. Choose locations with afternoon shade or add shadecloth. Cooler heat zones will be fine for blackcurrants and other ribes. Hotter … Continue reading "Growing blackcurrants in the upper south"
