Suitable climate is extremely vital in growing boysenberries. These berries grow in mild winters and warm summers. Hence, it is not advised to plant boysenberries in extreme climatic conditions.
You have to prepare the soil first and add a little bit fertility to it. Adding well-rotten manure to the soil will do the trick and help in better nourishment of any sort of plants you desire to grow. Avoid using chemical fertilizers.
Now before planting boysenberries, you have to make a trellis system. You have to integrate a two-wire trellis system in such a way that the top wire is used to tie the fruiting cane, whilst the other wire is used to train new growth that will yield fruit later. Creating a two-wire trellis system is considered to be the best way of growing boysenberries and it is highly recommended that you follow this method to have fruitful activity.
Place the boysenberry plants in the soil you have prepared in the garden and make sure you leave a 2-metre space between each one of them.
The method involved in growing boysenberries is quite the same as the one used for growing raspberries. However, boysenberries require far more pruning to keep their grown in hand at all times.
Keep the soil moist and protect the plants from any grazing pets, if you have any at home. You have to wait until the next year to harvest the fruit.
Boysenberries will be red during their growing phase and then start to turn black when getting ripened. Each plant is capable of producing about 5 kg boysenberries every season for the next 15 years. You have to cut back the cane attached to the top wire when you have fully harvested the berries and then cut them to ground. Tie the new growth canes to the top wires for bearing fruits for the next season.