What counts as a medium-sized tree
There is no strict definition, but “medium-sized” usually means a tree that matures somewhere around 20 to 40 feet tall. That is large enough to give real shade or structure, yet often small enough to suit a typical residential lot. Spread matters as much as height, so check both numbers before you plant.
Mature size varies with climate, soil, and cultivar, and nursery tags are best treated as estimates. A tree that stays modest in a cool region may grow noticeably larger in a long, warm growing season.
Fast growth: what you gain and what you give up
Fast-growing trees can fill a bare corner within a few years, which is appealing for shade, screening, or a new-build lot. The trade-offs are worth knowing:
- Some fast growers have softer, more brittle wood and may drop limbs in storms.
- Many are shorter-lived than slower species.
- Quick growth can mean more pruning, more litter, or more vulnerability to pests in some species.
None of this means fast trees are a poor choice. It does mean a “fast” species is not automatically the best one, and a moderately quick tree with sound structure is often a better long-term bet. For species that hold up better in storms, see the strongest trees against high winds. Regular pruning while the tree is young helps build a strong framework.
Fast-growing medium-sized trees to consider
Heights below are typical ranges commonly cited for these trees. Growth rates are approximate and depend heavily on conditions.
| Tree | Typical mature height | Notes |
|---|---|---|
| Eastern redbud (Cercis canadensis) | About 20 to 30 feet | Pink-purple spring flowers; often grows fairly quickly when young |
| ‘Prairifire’ crabapple (Malus ‘Prairifire’) | About 15 to 20 feet | Spring blossoms, small persistent fruit; regarded as disease resistant |
| River birch (Betula nigra) | Often 30 feet or more | Peeling bark; tolerates wetter soils; can grow taller than 40 feet |
| Emerald Green arborvitae (Thuja occidentalis ‘Emerald Green’) | About 8 to 12 feet | Narrow evergreen, good for tight spaces; more of a tall shrub-like screen |
| Golden rain tree (Koelreuteria paniculata) | About 30 to 40 feet | Yellow summer flowers; tolerant of a range of soils |
| Crape myrtle (Lagerstroemia) | Varies widely by cultivar | Warm-climate flowering tree; choose a cultivar sized for the space |
Eastern redbud
A popular small to medium tree for early spring color. It tends to suit part shade to sun, and young trees often put on steady growth. Redbuds can be shorter-lived than some shade trees.
River birch
Grows quickly and is valued for its exfoliating bark and tolerance of moist ground. Because it can become fairly large, it suits roomier yards better than very small lots. Keep it away from foundations and septic lines. Our guide to trees for waterlogged and wet soil covers river birch alongside other wet-tolerant species.
Crabapple
Compact and showy, a good fit for smaller yards. Disease susceptibility differs a lot between cultivars, so choose one described as disease resistant for your region.
Golden rain tree
Offers summer flowers and a rounded canopy. Check local guidance, since it self-seeds and is considered invasive in some areas.
Quickest options for privacy
If screening is the main goal, narrow evergreens and larger-growing conifers usually fill in fastest, although some of them grow beyond medium size. Our article on fast-growing trees for a privacy screen covers species, spacing, and the pitfalls of planting too close. Fast pines are another option for open sites, and how fast pine trees grow explains what to expect by species.
How to choose for your yard
- Measure the space. Note the distance to the house, fences, driveways, and overhead lines. Roots and canopy both need room.
- Check sun and soil. Match the tree to full sun, part shade, or wet or dry conditions rather than trying to change the site.
- Check your hardiness zone. Pick species rated for your winter lows.
- Think about the mature tree. Flower drop, fruit, seed pods, and leaf litter vary a lot.
- Consider native options. Native trees often support local wildlife and are well adapted to regional conditions.
Helping a new tree grow faster
Planting practices usually matter more than any fertilizer.
- Plant at the right depth, with the root flare at or slightly above soil level.
- Water deeply and regularly through the first one to two growing seasons.
- Mulch in a wide ring, keeping mulch off the trunk.
- Avoid heavy pruning and excess fertilizer at planting time.
- Stake only if the tree cannot stand on its own, and remove stakes after a year or so.
Frequently asked questions
What is the best medium-sized tree for a backyard?
It depends on sun, soil, climate and what you want from the tree. Redbud, crabapple, and golden rain tree are common choices for flowers and moderate size, while river birch suits larger or damper spaces. A local extension office or nursery can confirm what performs well nearby.
What tree has the fastest growth rate?
Among all trees, certain hybrid poplars, willows, and some evergreens such as Green Giant arborvitae and Leyland cypress are commonly described as very fast. Many of these grow larger than medium size or have trade-offs such as weaker wood, so fastest is not always best.
What is the quickest growing tree for privacy?
Fast evergreens are the usual answer, with arborvitae and cypress hybrids the most common. See the privacy screen guide for details.
What are the top five fastest-growing trees?
Lists vary by source and region. Fast growers that appear often include hybrid poplar, willow, Green Giant arborvitae, Leyland cypress, and river birch. Check whether each is appropriate and not problematic in your area.