In Sonoma it's bud break for the grapevines. After a week of warm, sunny weather things are bustin' out.
March 19th in Sonoma Valley
These old vines along Madrone Road in Sonoma Valley aren't budding yet. Maybe they're pruned later? Maybe the old guys just take longer to get moving.
This is the time of year the vineyards guys have to worry about frost. You can't lose those tender buds. Wind, water, and heaters can be used to prevent damage.