Pollen chart

Trees and shrubs – Spring

Common name Latin name Blooming months Pollen colour Availability Source for honeybees
Maple Acer spp. Feb – Apr -light yellow Wild fair
Manitoba Maple (Box elder) Acer negundo Feb – Apr -light olive Wild good
Norway maple Acer platanoides Apr – May -yellow green, olive Wild fair
Red Maple Acer rubrum Mar – Apr -grey brown Wild
Grey Alder Alnus incana Feb – Apr -brownish yellow Wild
American Hazel Corylus americana Mar – Apr -light green Wild and Ornamental fair/good
Crab Apple Malus spp. Mar – Jun -light olive Ornamental
Apple Malus domestica, Malus sylvestris Apr – May -yellow white Farmed and Ornamental very good
American Sycamore Platanus occidentalis Apr – May -light olive Wild
Almond Prunus amygdalus Feb -light brown to brown pollen Farmed mostly in California fair
Wild Cherry Prunus avium Apr – May -yellow brown, light brown Wild very good
Cherry Plum Prunus cerasifera -light brown to brown Wild fair
Sour Cherry Prunus cerasus Apr – May -dark yellow Ornamental and Farmed very good
Pear Pyrus communis Apr – May -red yellow Ornamental and Farmed good
Oak Quercus roburQuercus pedunculata May -light olive Wild minor
Blackberry Rubus spp. May – Jun -light grey Wild and Farmed
Raspberry Rubus idaeus May – Jun -white grey Wild and Farmed good
Willow Salix spp. Feb – Apr -lemon Wild good
American Elm Ulmus americana Feb – Apr -light grey Wild
Winged Elm Ulmus alata Feb – Mar -pale yellow Wild good

Flowers and annual crop plants – Spring

Common name Latin name Blooming months Pollen colour Availability Source for honeybees
Mustard Brassica arvenisi Apr – May   -lemon Farmed and Wild
Canola Brassica napus May – Jun   -lemon extensively Farmed very good
Winter aconite Eranthis hyemalis Mar – Apr -yellow Wild and Ornamental good
Snowdrop Galanthus nivalis Mar – Apr -orange, red fair
Henbit Lamium amplexicaule April -orange red, red, purplish red Apr – Jul poor
White Sweet Clover Melilotus alba May – Aug -yellow to dark yellow Wild and Farmed good
Yellow Sweet Clover Melilotus officinalis May – Aug -yellow to dark yellow Wild and Farmed
Sainfoin Onobrychis viciifolia May – Jul -yellow brown very good
Siberian squill Scilla sibirica Mar – Apr -steel blue Wild and Ornamental good
White mustard Sinapis alba June -lemon Wild and Farmed good
Chick weed Stellaria media Apr – Jul -yellowish Wild minor
Dandelion Taraxacum officinale Apr – May -red yellow, orange Wild very good

Flowers and annual crop plants – Summer

Common name Latin name Blooming months Pollen colour Availability Source for honeybees
Onion Allium cepa -light olive Farmed
Aster Aster spp. Sep-Frost -reddish yellow Wild and Ornamental
Land-in-blue, Bushy Aster Aster x dumosus Aug – Sep -bronze yellow Wild
Hemp Cannabis sativa Aug -yellow green good source
Persian centaurea Centaurea dealbata -hemp
Knapweed Centaurea nigra -very light olive
Cucumber Cucumis spp. -pale yellow Farmed
Melons Cucumis melo Jun-Frost -pale yellow Farmed
Pumpkin Cucurbita pepo Jun-Frost -bright yellow Farmed
Fireweed Epilobium angustifolium Jul – Aug -blue Wild
Joe-Pye weed, Bluestem Eutrochium spp.; 

Eupatorium purpureum

Aug – Sep -bistre green
Buckwheat Fagopyrum esculentum Jul – Aug -light yellow to light green Farmed good source
Sunflower Helianthus annuus Jun – Sep -golden Wild and Farmed
Jewelweed Impatients capensis -yellowish white
White Sweet Clover Melilotus alba -auburn Wild and Farmed
Yellow Sweet Clover Melilotus officinalis -auburn Wild and Farmed
Alsike Clover Trifolium hybridum -yellow brown good source
Crimson Clover Trifolium incarnatum -dark brown
White Clover Trifolium repens Jun – Jul -caledonian brown good source
Sweet Corn Zea mays Jun – Jul -yellowish white Farmed

Flowers and annual crop plants – Autumn

Common name Latin name Blooming months Pollen colour Availability Source for honeybees
Aster Aster spp. Sep-Frost -reddish yellow
Sweet autumn clematis Clematis ternifolia late Sept -white Ornamental
Pumpkin Cucurbita pepo Jun-Frost -bright yellow Farmed
Share