If you are only looking for the direct and straight answer then it is 65°F to 85°F (18°C to 29°C). In this particular temperature range, blackberry performs very well.
I have grown blackberries a lot in my backyard and my relatives are growing plants in different zones. So accumulating all our experience, I will be sharing with you the ideal weather (climate) to grow blackberry.
You can grow blackberries even in lower or higher temperatures that do not fall under my given range. But the quality and quantity of the fruits that you are going to pluck from your blackberry plant will depend upon the climate and the temperature.
Here is the short info table to get an idea of the ideal climate for blackberries
| Growth Stage | Ideal Temperature | Temperature Tips |
|---|---|---|
| Dormancy (Winter) | Below 45°F (7°C) | Blackberries need 800-1000 chilling hours for proper fruiting. |
| Blooming | Above 60°F (15°C) | Avoid late frosts to protect flowers. |
| Fruit Development | 65°F - 85°F (18°C - 29°C) | Temperatures above 90°F (32°C) reduce fruit size and quality. |
| Cold Protection | N/A | Use frost blankets or mulch to protect roots from frost. |
| Heat Protection | N/A | Apply mulch and irrigate regularly to reduce heat stress. |
Choose the Blackberry plant variant according to your weather/climate
In northern regions where you can expect extreme cold, the best variants would be Chester Thornless or Triple Crown. In warmer regions, you can choose different variants. Let's take a look at the Blackberry variants and their ideal temperature for healthy growth so that you can choose your variant easily.
| Region Type | Recommended Blackberry Varieties | USDA Growing Zones | Key Features |
|---|---|---|---|
| Cooler Regions | Chester Thornless, Triple Crown | Zones 5-7 | Cold-hardy, late ripening, thornless varieties. |
| Warmer Regions | Arapaho, Apache | Zones 6-9 | Heat-tolerant, early ripening, thornless varieties. |
| Moderate Climates | Natchez, Ouachita | Zones 6-8 | Moderately cold-tolerant, high yield, early-season ripening. |
Note: People often get confused between Blackberry and mulberry, they might look similar but are completely different. You can check the differences between blackberry and mulberry.
