Gardening Questions And Answers
Dryberry Disease – There are actually two diseases commonly known as dryberry disease in boysenberries. The first is common downy mildew, caused by the fungus Peronospera sparsa. The second is also a fungal disease caused by the pathogen Rhizoctonia rubi. Both diseases cause berries to suddenly shrivel up and dry out.
Boysenberry plants need a full sun location, with six to eight hours of sunshine per day. Plants prefer an organically-rich, well-draining soil, with a pH of 6.0-7.0. When you set out your transplants you can fertilize with 20-20-20 (NPK), according to package instructions, or mix in some well-rotted manure or compost.
Boysenberries grow best in moist soil. The moisture helps produce the boysenberry buds and berry development. When you water, make sure the water goes deep, but be careful not to overwater or flood your plants. Also, try not to get the leaves wet because that can cause rot and disease to your boysenberry plant.
Anthracnose – Also called cane dieback, anthracnose is caused by the fungal pathogen Elsinoe veneta. Cane and Leaf Rust – Caused by the fungus Kuehneola uredinis, cane and leaf rust symptoms will first appear as small, yellow pustules on the canes and foliage of boysenberry plants and their relatives.
Similar to other caneberries, boysenberries need fertilizer only during the springtime. Since boysenberries do not require large amounts of fertilizer, they do not really need fertilizer unless their growth is poor. However, they achieve the most consistent growth with annual springtime fertilization.
Transplanting Boysenberry Canes. Plant at the end of winter or start of spring. Boysenberries go into dormancy during the winter season, so right before they start new growth is the best time to transplant. Check the soil on occasion, and plant when the ground has thawed after the last freeze of the season.
Regardless if they are grown on permanent position or in containers, boysenberries require slightly acidic (pH 6 is perfect), well drained soil, rich in organic matter. Till the soil thoroughly up to one feet (~30 cm) deep – add aged or dried manure and compost/humus. If the soil is heavy some sand and compost/humus.