The condition and length of growing period on alpine snow bed are controlled by snow depth and melt timing. Life strategy of plants is needed to adjust for reproductive success to local condition along snow melt gradient. Flowering timing of Primula cuneifolia var. hakusanensis is correlated with snow melt timing after 10 days. This plant is one of the earliest blooming species after snow melt.

Growth stage (Juvenile, Vegetative and Reproductive stage), its transition and fruit set were investigated in three sites with four plots along snow melt gradient in two years, and compared with flowering timing of each plots.

In later flowering plots, low proportion of juvenile stage and high proportion of reproductive stage were found, and opposite trends were found in early flowering plots.

Later flowering plots showed the higher transition rate to vegetative stage which enable to bloom and remaining rate in reproductive stage. However, fruit set decreased in later flowering plots.

Decreasing fruit set seemed to be occurred by pollinator limitation due to increasing flowering species in later season. High proportion of reproductive stage which caused by higher transition to vegetative and remaining rate in reproductive has a role for compensation of low fruit set.