A few wineries also have lovely lavender gardens, among them Harms Vineyards & Lavender Fields in Napa and Ceago, which is north of Napa in Clear Lake. At Harms, you can combine wine tasting with your love of nature during a visit to for a sweet smelling tour of the winery where you can pick up organic gifts like lavender sachets, cooking stems and essential oils.
Weather can be variable this time of year. In a wet year, you might get rained on during your hike or be deterred from venturing outside. February is Napa's wettest month. Chances of rain taper off as the year goes on, but March is still on the higher side of precipitation - on average. That being said, you never know when an unseasonable hot spell, cold snap or real rainstorm might happen.