Landscaping Mistakes Maryland Homeowners Don’t Know They’re Making

Maryland is sometimes called “America in Miniature,” and the same is true of its landscaping headaches. From a climate that confuses every grass seed on the market, to invasive plant bans that most homeowners don’t know exist. What works in Virginia might tank in Bethesda, and what’s sitting on the shelf at your garden center in January might be illegal to put in the ground by April. 

After 15+ years working on thousands of landscaping projects, here are common landscaping mistakes we often find homeowners making.

Mistake 01: That Black Corrugated Drainage Pipe Is Already Failing

Drive through any residential area in Howard, Frederick, or Anne Arundel County and you’ll spot them: thin, ribbed black tubes snaking out of downspouts and disappearing into the lawn. They look like they’re doing something, but…

Corrugated plastic pipe collapses under the weight of soil, sediment, and tree roots. Meanwhile, your downspout is dumping thousands of gallons of roof water within two or three feet of your foundation. In a state where basements are common and heavy rain events are the norm, that spells hydrostatic pressure, seepage, and eventually mold.

Maryland’s clay soils have some of the lowest water infiltration rates in the region. Clay leaves almost no space for water to move through. Instead of sinking into the ground, water spreads across the surface. When it pools next to your foundation, it becomes a structural problem.

✓ How to Fix 

• Replace corrugated pipe for 4-inch Schedule 40 rigid PVC. 
• Extend at least 10–20 feet from the foundation. 
• Grade the soil to slope away from the house at a minimum of 2-3% grade.
• Add a rain garden at least 10 feet from the foundation to absorb runoff before it hits the street 

On larger lots, a grass-lined or stone-lined swale moves water cleanly across the yard and works with the slope instead of against it.

Mistake 02: Not Getting a Soil Test

Here’s something most Maryland homeowners don’t know: the fertilizer you’re spreading may never reach your grass roots at all. Consistent rainfall washes key nutrients out of the topsoil year after year, making the soil more acidic over time. 

When pH drops below 6.0, phosphorus bonds to iron and aluminum in the soil, forming compounds that plant roots simply cannot absorb. You can fertilize every season for five years and accomplish almost nothing. And the more you fertilize without fixing the pH first, the more money you’re wasting.

✓ How to Fix 

• Buy a soil test, and test it in the fall, not the spring.

A UMD Extension soil test costs less than a bag of fertilizer and tells you exactly what you need. Fall lime application followed by a spring retest is the professional standard in the Piedmont region.

Mistake 03: Do You Have Any of These 13 Illegal Plants?

As of January 15, 2026, Maryland banned 13 plants that were previously common at nurseries and garden centers. Some are almost certainly in your yard right now. This is one of the landscaping mistakes that catches people completely off guard, because these plants were sold legally for years.

These plants spread aggressively into natural areas, crowd out native species, and in some cases pose direct risks to local wildlife and human health.

Full list: Aralia elata, Berberis thunbergii, Cytisus scoparius, Euonymus alatus, Ligustrum obtusifolium, Nandina domestica, Phyllostachys aurea, Phyllostachys aureosulcata, Pyrus calleryana, Tetradium daniellii, Wisteria floribunda, Wisteria sinensis, Wisteria x formosa.

✓ How to Fix 

• Identify what’s banned on your property and swap it out for native alternatives that do the same aesthetic job.

Native plants require less water, attract more pollinators, and get through Maryland summers without the hand-holding that ornamental exotics demand.

Mistake 04: Growing the Wrong Grass and Improper Mowing

Maryland sits in the “transition zone”: too hot for cool-season grasses in July, too cold for warm-season grasses in February. This makes it one of the hardest states in the country to grow a consistent lawn.

The most common mistake? Planting Kentucky Bluegrass because it looks good in catalogs. However, it needs constant water, heavy fertilization, and fungicide treatments just to survive a Maryland August. 

Lawn scalping mistake: During July and August, your Maryland lawn should be mowed at 3 to 4 inches. Mowing too short will prevent your grass from being able to properly soak up nutrients, stunt the roots, and can damage the grass blades.

Irrigation mistake: Watering in the evening leaves grass blades wet for 10 or more hours overnight, which invites fungus to grow, killing the grass and leaving it patchy. Brown patch doesn’t care how much money you spent on your lawn.

✓ How to Fix

• Turf-Type Tall Fescue (TTTF) is the right choice for this region. It roots several feet deep, handles drought by going briefly dormant, and bounces back when fall rains arrive. 
• Overseeding in the fall creates more grass which makes the yard healthier.
• For mowing, follow the one-third rule: never cut more than one-third of the blade at once.
• For irrigation, water between 5 am to 11 am. One long session does more for your lawn than a few minutes of sprinkling every day.

Mistake 05: You Installed Landscape Fabric and Called It Done

Walk into any garden center and you’ll find rolls of landscape fabric stacked near the mulch and gravel. It seems practical for the first two seasons, then it stops and creates a bigger problem underneath:

1. Mulch decomposes on top of the fabric.
2. Weed seeds germinate in that layer and root through the fabric.
3. You can’t pull without pulling the fabric along.
4. The fabric degrades into brittle plastic shreds that tangle in your tools.
5. In Maryland’s clay-heavy soils, it also traps water at the surface and increases runoff.

Susan Harris over at Garden Rant compiled hundreds of responses from the Landscaping subreddit on what homeowners most regret about their yards. Landscape fabric was by far the top answer, and we can see clearly why…

✓ How to Fix

• Skip the fabric entirely. 
• Instead use 2 to 3 inches of shredded hardwood mulch, refreshed annually. It suppresses weeds, retains moisture, and improves soil as it breaks down.

At Blue Collar Scholars, we know Maryland’s rules and put that knowledge to work on every property we touch. From soil testing and Bay-compliant fertilization to native plant installs and drainage engineering that actually lasts.

Maryland Has Rules. Your Yard Deserves Someone Who Knows Them.

Most of these landscaping mistakes look like reasonable decisions until something starts dying, or until a project triggers a regulation you didn’t know existed. 

At Blue Collar Scholars, we know Maryland’s rules and put that knowledge to work on every property we touch, from soil testing and proper drainage to native plant installs that will still look good a decade from now.

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