Blackberries are a delicious and nutritious fruit, but not all gardeners have the space for a large patch. With the right variety and care, you can successfully grow blackberries in containers on a patio, deck, or balcony instead. Here are some tips for achieving a bountiful harvest from potted blackberry plants.
Choosing a Variety
Look for a variety specially bred for container growing. ‘Apache’ thornless blackberries produce well in pots with a more compact, upright growth habit. Other good choices include ‘Triple Crown’ and ‘Cherokee’. Avoid overly vigorous varieties meant for open gardens.
Container Selection
Use a container at least 18-24 inches wide and deep to allow for adequate root growth. Terra cotta, plastic, or glazed ceramic pots all work well. Make sure there are drainage holes.
Soil Mix
Blackberries need well-draining soil that retains moisture. Use a potting mix amended with compost or other organic matter. I like adding perlite or gravel for extra drainage and aeration.
Sunlight and Placement
Blackberries need at least 6 hours of direct sun per day. Place pots in a spot receiving full sun if possible, such as a south or west facing patio. Consider a portable plant stand you can move as needed.
Watering and Fertilizing
Water thoroughly whenever the top few inches of soil become dry. Use a diluted liquid fertilizer monthly from spring to fall according to label instructions.
Pruning and Trellising
Prune back canes that produced fruit to the base after harvest. Train new canes to grow up a sturdy trellis or cage for support. Tie canes as needed to keep the plant upright.
Pests and Diseases
Watch for common issues like leafhoppers, spider mites or powdery mildew. Treat any problems promptly according to organic or chemical controls.
With the right care, your container grown blackberry plant will reward you with a bountiful harvest of sweet berries to enjoy all summer long! Let me know if you have any other questions.