Versatile all season greenleaf variety. Muir is a medium-sized, slow-growing, medium green open heads. Upright habit with well-filled hearts that are sweet to taste. More compact and tighter heads than Tropicana and Bergams. Suitable for open field and unheated greenhouse production. Robust against bolting and internal tipburn. (HR:DM/LA/CR/TBSV IR:LMV) 45 days Pkt contains 85-100 sds