Warrenton's Approved vs. Prohibited Tree Species

Warrenton has a real list of approved and prohibited tree species — and most homeowners don't know it exists until after they've already planted something on it. Choosing a new tree sounds simple at first: you go to a nursery, pick something that looks nice, plant it, and wait for it to grow.

But in Warrenton, there's a little more to think about. The Town has an approved tree species list in its zoning ordinance, along with a list of trees not considered appropriate for certain plantings. The reason is simple: some trees perform better in Warrenton's environment, while others cause problems over time.

My name is Inmer Blanco and I'm the owner of Green Tree Services in Warrenton, VA. As an arborist, I see this often — homeowners, property managers, and developers choosing trees based only on looks, without thinking about long-term growth, root space, disease resistance, storm durability, or whether the species is invasive.

Warrenton's tree species list is part of Article 8 of the Town's zoning ordinance, covering landscaping requirements for site development plans, parking lots, streets, tree preservation, and related planting standards. The Town's Tree Board also points residents and applicants to these guidelines when submitting planting plans.

The Town's landscaping rules aren't just about making properties look better. The ordinance says the goal is to protect public health, safety, property values, open space, traffic safety, and the overall function of Warrenton's tree canopy — including shade, windbreaks, energy conservation, pedestrian safety, and preservation of natural vegetation.

That matters because trees aren't short-term landscaping. A tree planted today can affect a property for decades. The wrong tree in the wrong spot can eventually lead to:

• Sidewalk or pavement damage
• Weak branches that fail during storms
• Roots growing too close to structures or utilities
• Poor survival in local soil or climate conditions
• Invasive spread into nearby natural areas
• Expensive removal work later

That's why the Town encourages species better suited for local conditions and discourages or prohibits species more likely to create problems.

Warrenton's ordinance separates acceptable trees into different categories. Canopy trees are deciduous trees expected to grow 30 feet or taller — the larger shade trees that support the urban forest over time.

Many of these are native trees — important because native species are generally better adapted to the local environment and tend to support local wildlife better than many ornamental imports.

The ordinance also includes medium and ornamental trees under 30 feet tall, useful where a large canopy tree wouldn't fit — near buildings, smaller yards, utility lines, or tighter landscape areas.

But being on the approved list doesn't mean a tree belongs everywhere. A white oak can be excellent — but it needs room. A Japanese maple is beautiful near a home, but won't provide the same shade or canopy value as a larger native tree. The right species still depends on the site.

Warrenton's ordinance also lists several trees that shouldn't be planted as street trees:

This is where a lot of homeowners get surprised. Some of these trees are common and easy to find. Some, like Callery pear, were widely planted for years because they looked good in spring and grew quickly. That doesn't mean they're good long-term choices.

So while Bradford pear looks attractive for a few weeks each spring, it can become a real problem later. From my perspective as an arborist, this is one of the trees I'd generally avoid planting.

For a similar ornamental look, better-behaved alternatives include serviceberry, redbud, fringetree, dogwood, or certain magnolia varieties, depending on the site.

The ordinance also flags species that can negatively affect native plant communities, damage nearby structures or infrastructure, or fail structurally more often.

This doesn't mean every one of these trees is bad in every possible setting — it means they're not appropriate for meeting the Town's ordinance requirements in those specific situations. A tree that works in a large open field may not work along a street, sidewalk, parking lot, or tight buffer area. That distinction matters.

Warrenton's ordinance also addresses invasive plants directly. Any species listed by the Virginia Department of Conservation and Recreation with a "High" invasiveness rank must be removed from the property and can't be used for Tree Preservation Credits. Species with a "Medium" invasiveness rank may remain at the owner's option, but also can't count toward those credits.

In plain English: the Town doesn't want invasive trees counted as valuable preserved canopy. An invasive tree might technically be a tree, but it can still harm the surrounding ecosystem — which is why it's worth checking both the Town's approved species list and the Virginia invasive plant list before planting something new.

For most homeowners, the takeaway isn't that you need to memorize the ordinance. It's this: don't pick a tree only because it looks good at the nursery. Think about what it'll be like in 10, 20, or 40 years.

Before planting, it helps to ask:

1. Will this tree have enough space when mature?
2. Is it native or well-adapted to Warrenton's climate?
3. Is it known to be invasive?
4. Will the roots or branches conflict with sidewalks, driveways, buildings, or utilities?
5. Is the tree structurally strong enough for storms?
6. Is it an approved or discouraged species under local guidelines?

This is especially important if the tree is part of a site plan, street frontage, parking lot, buffer area, HOA landscape plan, or commercial property improvement — but the same thinking applies to a regular residential yard too.

Good tree selection prevents a lot of future problems. Poor selection often creates expensive ones years later. Tree choice can also affect the rest of your yard — shade, root competition, and grass growth — which is why we also cover how trees affect your lawn care in more detail.

If you're planting one small ornamental tree in the middle of your yard, you may be fine choosing from the Town's list and checking the mature size. But if you're planting near a structure, driveway, road, sidewalk, utility line, drainage area, or property boundary, it's usually worth getting a professional opinion first — especially if:

• You're replacing a tree that was removed
• You're planting near pavement
• You're dealing with stormwater or drainage issues
• You're part of an HOA or commercial property
• You're unsure whether a species is invasive
• You want a tree that lasts decades, not just looks nice for a few years

Warrenton's approved and prohibited tree species list exists for a reason — it protects the Town's tree canopy, reduces future maintenance problems, and encourages better planting decisions. If you're not sure which tree belongs on your property, it's always better to ask before planting than to deal with a removal problem years later. And if you already have a prohibited species like Bradford pear that's splitting or declining, our tree removal page covers what that process looks like.