Since the winters here are so mild, there is a possibility for some overwintering flowers, such as horticultural heather and brassicas, to be collected even in January and February, but until the hazelnut catkins come out in mid-February, nectar and pollen amounts are restricted. 

Depending on the weather it is possible that a spring time dearth in April and early May after the maple nectar flow will force the beekeeper to feed syrup to the newly expanding hive.

Fruit trees and wildflowers bridge the gap until the major nectar flow from Himalayan blackberries starts in late May.  Other varieties, such as snowberries, thimbleberries, salmonberries, and native blackcap raspberries, can also provide substantial early nectar. 

Dry weather in 2017-2019 led to failure in the blackberry nectar flows and resulted in decreased honey production.  Cultivated crops, such as apples, stone fruits, and farmed berries (European raspberries and blueberries), are also eagerly collected by the bees in May, June, and July. 

The last nectar flow begins in late June with fireweed and continues until mid-August.  Some beekeepers move their hives into the surrounding hills in August to catch the last of the fireweed nectar flow after the end of the blackberries.

For beekeepers in more urban settings, bees will continue (into late October) to collect large amounts of both pollen and nectar from English ivy.