Trees for Bees: Planting for the Long Term

Majestic linden avenue with interlocking canopies forming a green leafy cathedral — Lindens are the most important forage trees in Central Europe -- a single mature linden can deliver up to 60 kg of nectar per bloom season.

While a flower meadow shows results within a single season and needs renewal after a few years, planting bee trees is an investment in the future. A linden tree planted today will become a forage source in 10-15 years -- and then reliably deliver nectar and pollen for 80-100 years. No other intervention in the forage landscape has a better long-term cost-benefit ratio.

In this lesson, you will learn about the most important bee trees, their site requirements, planting instructions, and expected forage value.

80-100 Years

can a linden tree provide bee forage -- the longest-term investment in bee pasture

The Top 10 Bee Trees Compared

Willow (Salix sp.) -- The Early Starter

Pussy willow catkins in early spring — Pussy willow catkins are the first signal of spring -- and for bee colonies the first major energy source after winter.

Why Plant Willows?

Willows are the fastest-growing native woody plants and provide notable forage after just 3-5 years. They are the first major nectar and pollen source of the year and thus indispensable for the spring development of colonies.

Recommended Willow Species for Beekeepers

Willow planting made easy

Willows are among the easiest woody plants to propagate. A cutting (20-30 cm long, finger-thick shoot) stuck into moist soil in spring or autumn will almost certainly take root. No root development needed, no expensive plant stock -- just cut a branch, stick it in the ground, keep moist, done.

Note: Willows are dioecious!

Willows are dioecious: there are male and female plants. Only male plants provide the important pollen. Female plants also offer nectar, but significantly less. When buying or propagating, ensure you choose male specimens (recognizable by the stamens in the flower catkins).

Linden (Tilia sp.) -- The Queen of Forage Trees

If there were one single tree every beekeeper should plant, it would be the linden. No other native tree provides so much nectar per footprint over so many decades.

Small-Leaved vs. Large-Leaved Linden

The linden is the perfect bee tree. During the short bloom period of a large tree, a single colony can bring in 15-30 kg of honey. Anyone who plants a linden today creates a forage monument for generations.

Linden Planting Guide

Planting a Linden Tree Properly

1-2 hours

Timing: October-March (dormant season), ideally October-November (roots still grow before winter).

1. Choose location

Minimum distance to buildings: 10-15 m (lindens grow large!)
Full sun to light shade
Not directly over utilities or next to parking areas (honeydew drips on cars!)

2. Dig planting hole

Twice as wide and 1.5x as deep as the root ball
Loosen the bottom (break up compacted layers)
Mix excavated soil with compost (1:3)

3. Place tree

Top of root ball level with ground surface
Fill in soil, tamp down in layers (no air pockets!)
Form watering rim (soil wall 10 cm high, 50 cm radius)

4. Stake and water

Set 3 tree stakes in a triangle, secure tree with ties
Water thoroughly immediately (50-80 liters)
Water regularly during the first 2-3 summers (20-30 L per week during drought)

10-15 Years

until a planted linden tree blooms significantly for the first time -- then for decades to come

Maple (Acer sp.) -- The Versatile Companion

Recommended Maple Species

Field maple: The underrated all-rounder

The field maple (Acer campestre) is the perfect bee tree for small properties: at 8-15 m it stays significantly smaller than Norway or sycamore maple, can be pruned as a hedge or specimen tree, is extremely robust (drought-tolerant, urban-climate-proof, wind-resistant), and reliably provides nectar and pollen. As a hedge plant, it can even stand on narrow property edges.

Black Locust (Robinia pseudoacacia) -- The Honey Tree

The black locust provides valuable "acacia honey" and is one of the most productive forage trees of all. However, it is not uncontroversial.

Pros and Cons of Black Locust

Black locust and nature conservation

The black locust is on the invasive species list in many regions. Near nutrient-poor grassland, dry grassland, and heathland, it should NOT be planted, as through nitrogen fixation it alters the nutrient-poor soil and displaces native plants. On already nutrient-rich sites (gardens, settlement edges, industrial brownfields), planting is unproblematic.

Chestnuts -- Two Trees, Two Worlds

Horse chestnut (Aesculus hippocastanum): May, nectar value 2-3, pollen value 3, 20-30 m, urban tree. The nectar guides change color (yellow = fresh, red = empty) as a signal for bees.

Sweet chestnut (Castanea sativa): June-July, nectar value 3, pollen value 3, 15-25 m, wine-growing climate. Edible fruits, bold monofloral honey.

Sweet chestnut: Future tree for climate change

The sweet chestnut benefits from climate change: as a warmth-loving tree, it is expanding its range northward. Where previously only wine-growing climates sufficed, it now grows in milder areas across Central Europe. For beekeepers in these regions, the sweet chestnut is a future-proof investment.

Fruit Trees -- Diversity in a Small Space

Apiary beneath blooming cherry trees — Fruit trees combine food production for people and bees. A traditional orchard is one of the most species-rich biotopes in Central Europe.

Recommended Fruit Trees for Beekeepers

Traditional orchards: The beekeeper's biotope

A traditional orchard with standard fruit trees of various species is one of the most valuable biotopes for bees and other insects. The combination of fruit blossom (April-May), meadow flowers in the understory (May-September), and deadwood in old trees (nesting sites for wild bees) creates an ideal habitat. Heritage varieties like Cox Orange, Bramley, or local cultivars are often more nectar-rich than modern varieties.

Exotics and Future Trees

Bee Tree / Korean Evodia (Tetradium daniellii)

The bee tree is the discovery of recent decades for beekeeping:

Origin: East Asia (China, Korea)
Bloom period: July-August -- right in the forage gap!
Nectar value: 4 (excellent)
Pollen value: 3 (good)
Height: 8-12 m
Growth: Fast (30-60 cm/year), blooms from the 3rd-5th year
Winter hardiness: To approx. -20°C (fully hardy in most of Central Europe)
Site: Full sun, well-drained soil, urban-climate-proof

3-5 Years

to first bloom -- the bee tree (Tetradium) is one of the fastest forage trees

Tree of Heaven (Ailanthus altissima) -- The Controversial One

Origin: China
Bloom period: June-July
Nectar value: 3-4, Pollen value: 2
Status: Invasive neophyte! Listed on the EU list of invasive alien species
Recommendation: Do NOT actively plant! Where it already stands, however, it provides valuable forage (especially in cities)

Do not plant invasive tree species!

However tempting the forage value of some exotics may be: invasive species must not be actively introduced into the landscape. The tree of heaven (Ailanthus altissima) is on the EU list and may not be planted near nature reserves. The same applies to black cherry (Prunus serotina). Instead, use the bee tree (Tetradium daniellii), which is NOT currently considered invasive.

Japanese Pagoda Tree (Styphnolobium japonicum)

Origin: East Asia
Bloom period: August-September (very late!)
Nectar value: 3-4, Pollen value: 2
Height: 15-25 m
Special feature: One of the latest-blooming trees of all, ideal for late summer supply. Urban-climate-proof, drought-tolerant. Not invasive.

Practical Recommendations: What to Plant Where?

Summary

Core Knowledge: Bee Trees

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Knowledge Check

In the next lesson, you will discover the surprising forage sources of the city -- and why urban beekeeping often produces better honey than rural beekeeping.