The Witt Winter Garden at the Washington Park Arboretum is stunning. It has probably the greatest diversification of winter blooming plants and is in full glory right now and openly available. The scent is incredible and easily detected yards away. And watch out for low flying hummingbirds! Otherwise, the best winter garden features will be gardens that have restricted access, like the Dunn or Miller garden (need advance reservation) or in private gardens.

Other local collections open to the public with winter-blooming plants on display include the Bellevue Botanical Garden and the Carl English Garden.

Here is a link that might be useful: Bellevue Botanical Garden Plant of the Month

Many different kinds of early flowers coming on now, during this continued mild spell. With nights in the 40's (F.) and days in the 50's, there has been no frost damage to vulnerable types.

Thankyou all for the advice. We enjoyed our time in Seattle. It was good to be back at the NW Flower Show. Witt Winter Garden was enjoyable and we took advantage of the warm afternoon sun to walk through much of the arboretum. We also enjoyed strolling along the sidewalks in several residential districts near the park and closer to downtown. It seems to me that Seattle is several weeks ahead of the Fraser Valley in terms of spring blooms. In addition to what we expected to see in bloom, we were impressed with a number of gardens with daffodils & bergenia's in full bloom.

Also, it was interesting to see at University Village the impressive display of flower and plant pots out already in front of shops.

Portland is often 2 weeks ahead of Seattle and Vancouver 2 weeks behind.

This year we got the best winter climate. Pushed up 45 days. Tender growth subject to teen temps through May.
Nothing to brag about.
What you see today that is over the top awesome is hell bent tommorrow.
Scrambling out.

tsk, tsk......such negativity! This is a pretty typical El Nino winter, although a bit more mild than most. It is expected to continue through spring, so more mild, wet weather to come. Not sure where you live that experiences temperatures in the teens as late as May - the record low temperature for May in the Puget Sound area was 28F in 1954. 46-50F is the average low for May.