Which factor does NOT influence the timing of pruning Tokay grapevines?

The timing of pruning Tokay grapevines is influenced by various physiological and environmental factors critical for the health and productivity of the vines. Temperature changes play a significant role, as pruning is often timed to occur during the dormant season when temperatures are cooler but not freezing, which helps to minimize stress on the plants.

The running sap, which refers to the flow of sap during warmer weather, is also an important consideration since pruning when sap is running can lead to excessive bleeding, which might harm the vine.

Soil moisture levels are crucial as well since grapevines require adequate moisture for successful growth, and pruning at times of low moisture can put additional stress on the plants right before the growing season.

On the other hand, the color of the leaves does not directly affect the timing of pruning. While it may indicate the health of the vine, it does not provide definitive information for determining the optimal time for pruning activities. Therefore, it stands apart from atmospheric and physical conditions that directly influence vine management practices.