The hardest time of year for native pollinators in temperate North America is not winter. It's March and early April — the few weeks when winter has just released its grip, the bees have started emerging on the warm days, and almost nothing is yet in bloom. This is the hunger gap.
The bees that emerge first are mostly queens. After overwintering alone underground, a bumblebee queen wakes up on the first sixty-degree day, hungry, weak, and looking for nectar. She has maybe a week to find enough food to start a colony. If she doesn't find a nectar source within range of where she emerged, she dies. The colony she would have founded never exists. Every worker bee, every late-summer drone, every next-year's queen — gone, because there were no flowers in March.
This is not hyperbole. Insect ecologists have been ringing the alarm about the early-spring nectar gap for at least fifteen years. It's one of the strongest selection pressures on temperate-zone pollinators, and it's one of the easiest things for a homeowner to fix. Plant something that blooms in March. The bees will literally show up to it.
What's actually blooming.
In the eastern half of North America, here's what we'd plant for March-into-April bloom, in rough order from earliest to latest:
- Witch hazel (Hamamelis virginiana for late fall, H. vernalis for late winter). The earliest. Some species bloom in February in the right conditions. Small, ribbon-like yellow flowers on bare branches.
- Spring beauty (Claytonia virginica). A small woodland ephemeral that carpets the floor in March. Specifically pollinated by the spring beauty bee (Andrena erigeniae), which feeds only on this plant. No spring beauty, no spring beauty bee.
- Bloodroot (Sanguinaria canadensis). White flowers in early March, gone by mid-April. A spring ephemeral.
- Virginia bluebells (Mertensia virginica). Pink buds opening to true blue in late March/April. Important nectar source for early bumblebee queens.
- Native willows (Salix discolor — pussy willow). Often the first major nectar source most years. The fuzzy gray catkins are functionally giant pollen pads.
- Red maple (Acer rubrum). Most people don't think of maples as flowering trees, but they bloom in March, before leafing out. Critical food for early bees.
- Trout lily (Erythronium americanum). Yellow flowers in April, gone by May. Specialist bees depend on it.
The trade-off.
Spring ephemerals have a particular pattern: they emerge, flower, and fade fast, often disappearing entirely by June. This is why they're rarely sold at conventional garden centers — they don't have the "all-season color" that most plant shopping is organized around. They look great for three weeks and then they're gone.
From an ecological standpoint, this is a feature, not a bug. Spring ephemerals do their work during the brief window when the deciduous canopy hasn't yet leafed out and full sun reaches the forest floor. They feed the early bees, set seed, and retreat. By summer, the ground is shaded and other plants are doing the work.
If you're used to ornamental gardening with summer-blooming annuals, spring ephemerals require a small mental shift. You're planting for a moment, not a season. The moment matters more than its length.
Where to put them.
Most spring ephemerals are woodland species. They want partial shade, moist soil, and a layer of decomposing leaves. The best place to plant them is under a deciduous tree. The conditions there match what they evolved for, and the timing works — they bloom before the tree leafs out and gets full sun, then go dormant once the canopy fills in.
If you have an oak, a maple, or any shade tree, the ground under it is prime real estate for spring ephemerals. Most homeowners ignore that ground or plant non-native hostas there. The ecological yield of replacing the hostas with bloodroot, spring beauty, and trout lily is enormous — you're filling the most ecologically valuable bloom window with the most valuable food source.
Native-plant nurseries sell spring ephemerals as small bulbs or rhizomes in fall, ready for spring emergence. Plant them in October. Wait. By March of the following year, you'll have flowers, and the bees will know what to do.
— The editors