These fruits and veg­eta­bles are typ­i­cal­ly in sea­son in May in Wash­ing­ton state:

• Apples, Brae­burn
• Apples, Cameo
• Apples, Fuji
• Apples, Gala
• Apples, Gold­en Delicious
• Apples, Red Delicious
  
• Arugu­la
• Aspara­gus
• Cilantro
• Dan­de­lion
• Gar­lic Scapes
• Mush­rooms
  
• Radish­es
• Rhubarb
  
• Spinach, Baby
• Spinach, Bunch
• Water­cress
  

See What’s in sea­son in Wash­ing­ton state for sources and a Google Sheets spread­sheet with data for the whole year.