Thunderhead primocane fruiting blackberry

‘Thunderhead primocane fruiting blackberry, produces high yields of berries with excellent firmness and fruit quality for the fresh market. ‘Thunderhead’ is the first erect primocane fruiting blackberry released by the US Department of Agriculture (USDA)–Agricultural Research Service (ARS) Horticultural Crops Production and Genetic Improvement Research Unit (HCPGIRU) breeding program in Oregon, USA. The cultivar contains a genetic background derived primarily from eastern US primocane fruiting blackberry germplasm (developed previously by John Clark at the University of Arkansas erect in cane architecture, and has a hybrid mixture of Rubus backgrounds, including strong contributions from species native to eastern and southeastern United States, Smaller seed size, and thornless heaviest producer of the primocane fruiting varieties. Offered from www.penseberryfarm.com