What's flowering for honey bees near Westminster, CO (Front Range Urban Corridor / High Plains-Rocky Mountain Foothills Ecotone (Colorado Piedmont)), month by month — 37 local nectar and pollen sources.
Open the interactive, printable calendar →← More Colorado bee forage calendars
| Plant | Scientific name | Category | Bloom months | Forage value |
|---|---|---|---|---|
| Siberian Elm | Ulmus pumila | Trees | Mar | medium |
| Silver Maple | Acer saccharinum | Trees | Mar–Apr | medium |
| Boxelder | Acer negundo | Trees | Mar–Apr | low |
| Plains Cottonwood | Populus deltoides | Trees | Mar–Apr | medium |
| Peach | Prunus persica | Trees | Apr | medium |
| Apple/Crabapple | Malus spp. | Trees | Apr–May | high |
| Skunkbush Sumac | Rhus trilobata | Shrubs & Vines | Apr–May | medium |
| Golden Currant | Ribes aureum | Shrubs & Vines | Apr–May | medium |
| Common Lilac | Syringa vulgaris | Shrubs & Vines | Apr–May | medium |
| Wild Plum | Prunus americana | Shrubs & Vines | Apr | medium |
| Dandelion | Taraxacum officinale | Wildflowers & Weeds | Apr–May | high |
| Chokecherry | Prunus virginiana | Trees | May | medium |
| Black Locust | Robinia pseudoacacia | Trees | May–Jun | high |
| Russian Olive | Elaeagnus angustifolia | Trees | May–Jun | high |
| Caragana / Siberian Peashrub | Caragana arborescens | Shrubs & Vines | May | medium |
| Black Medic | Medicago lupulina | Clover & Legumes | May–Sep | low |
| Musk Thistle | Carduus nutans | Wildflowers & Weeds | May–Jul | medium |
| American Linden | Tilia americana | Trees | Jun–Jul | high |
| Catalpa | Catalpa speciosa | Trees | Jun | medium |
| Virginia Creeper | Parthenocissus quinquefolia | Shrubs & Vines | Jun–Jul | low |
| Wild Grape | Vitis riparia | Shrubs & Vines | Jun | low |
| White Dutch Clover | Trifolium repens | Clover & Legumes | Jun–Aug | high |
| Red Clover | Trifolium pratense | Clover & Legumes | Jun–Aug | medium |
| Yellow Sweetclover | Melilotus officinalis | Clover & Legumes | Jun–Sep | high |
| White Sweetclover | Melilotus albus | Clover & Legumes | Jun–Sep | high |
| Alfalfa | Medicago sativa | Clover & Legumes | Jun–Aug | high |
| Field Bindweed | Convolvulus arvensis | Wildflowers & Weeds | Jun–Sep | medium |
| Canada Thistle | Cirsium arvense | Wildflowers & Weeds | Jun–Aug | medium |
| Purple Prairie Clover | Dalea purpurea | Wildflowers & Weeds | Jun–Jul | medium |
| Golden Rain Tree | Koelreuteria paniculata | Trees | Jul | medium |
| Common Sunflower | Helianthus annuus | Wildflowers & Weeds | Jul–Sep | high |
| Curlycup Gumweed | Grindelia squarrosa | Wildflowers & Weeds | Jul–Sep | medium |
| Rabbitbrush | Ericameria nauseosa | Shrubs & Vines | Aug–Oct | high |
| Prairie Sage / Fringed Sage | Artemisia frigida | Wildflowers & Weeds | Aug–Sep | low |
| Canada Goldenrod | Solidago canadensis | Wildflowers & Weeds | Aug–Sep | high |
| Heath Aster | Symphyotrichum ericoides | Wildflowers & Weeds | Aug–Oct | high |
| Smooth Aster | Symphyotrichum laeve | Wildflowers & Weeds | Sep–Oct | medium |
A bee forage bloom calendar shows which nectar and pollen plants are blooming in a given area, month by month, so beekeepers can plan colony buildup, splits, and honey harvests around the local bloom.
Every calendar starts with your zip code's specific growing region — its climate, elevation, and local ecology. From there, we use AI trained on horticultural and beekeeping knowledge to work out which nectar and pollen plants actually grow there and when they typically bloom, the same kind of judgment call an experienced local beekeeping mentor or extension agent would make, just automated so any US zip code can get a calendar in minutes instead of years of local observation. Each calendar typically covers 25-40 plants across trees, shrubs and vines, clover and legumes, and wildflowers, plus the area's named honey flows. We keep the exact generation process under wraps, but the goal is always the same: real, locally-grounded bloom timing instead of generic national averages.
The region-specific bloom timing, honey flows, and beekeeping notes are produced by an AI system drawing on general horticultural, ecological, and beekeeping knowledge, applied to your area's specific climate and geography — rather than looked up from a single official bloom-timing database, since no such nationwide dataset exists at this level of local detail.
A nectar dearth (or dearth period) is a stretch of the year when little or no medium-to-high value forage is blooming. Colonies may need supplemental feeding during a dearth to avoid starvation or robbing behavior.
A honey flow (or nectar flow) is a period when nectar is abundant enough for a colony to produce surplus honey beyond what it needs to survive, often tied to a specific major regional bloom like clover or black locust.
Bloom timing is generated from regional climate and ecology data and is intended as a general planning reference. It may not perfectly match a specific microclimate, so it's worth cross-checking against your own field observations.
Yes. Enter any US zip code to get a free, printable bee forage bloom calendar — no signup required.