Growing Raspberries in Southwest Idaho

Southwest Idaho provides an exceptional climate for cultivating raspberries, making it an excellent region for growing these delectable fruits. The area's climate, characterized by warm summers and well-draining soils, is particularly well-suited to raspberry cultivation. Raspberries can be divided into two primary categories: summer-bearing (floricane) and fall-bearing (primocane). Summer-bearing varieties produce one bountiful crop in early to midsummer, while fall-bearing varieties offer two harvests—one in mid-summer and another in late summer or early fall. Additionally, raspberries come in four distinct colors: red, yellow, black, and purple, each bringing unique flavors and aesthetic appeal to your garden.

For optimal growth, raspberries thrive in sandy loam with excellent drainage. Avoid planting in areas prone to standing water or poor drainage, as these conditions can lead to root rot. A location that enjoys at least 6 hours of full sun each day is ideal for robust plant development. To ensure a successful start, prepare the planting site by removing any perennial weeds that could compete with the raspberries for nutrients. Plant raspberries as soon as the ground is workable in spring, and use a low-chloride fertilizer to promote healthy growth. A balanced “complete” fertilizer containing phosphorus, nitrogen, potassium, and possibly other essential nutrients is highly recommended. For detailed information on fertilizing raspberries, refer to this excellent publication.

Consistent watering and proper annual pruning are key to a successful raspberry harvest. Maintain regular irrigation from the bloom stage through harvest to achieve the best berry size, but be cautious of overwatering. Raspberries are particularly sensitive to excessive moisture and can develop root rot in overly wet conditions. Watering directly at the base of the plants is preferable to using overhead sprinklers, which can increase the risk of fruit and cane diseases. Effective pruning enhances light and air circulation around the plants, helps remove dead or weak canes, and minimizes disease and pest issues.

Summer-bearing raspberries should be pruned twice a year: once in late fall to early spring and again following the summer harvest. Fall-bearing raspberries should be pruned in late fall after the final harvest. For comprehensive pruning techniques, the University of Idaho’s College of Agriculture and Life Sciences YouTube channel offers valuable instructional videos.

With the right care and attention, cultivating raspberries can be a deeply rewarding experience. By adhering to these practices, you can look forward to a plentiful and satisfying harvest, bringing the joy of homegrown raspberries to your table.