What lands in the trough between March and June
Homeowners tend to think of gutter debris as leaves, which makes spring feel like the off season. It isn't. The material that comes out of a gutter in late May is worse to deal with than October leaves, and there's often more of it by weight.
Oak tassels come first and last longest. Those stringy catkins drop for weeks, they mat together into ropes, and they wedge into a downspout outlet in a way dry leaves never do. Silver maple seeds land at the same time and sprout wherever they settle, which is why people find a row of little trees growing out of the gutter above the porch. Add sweetgum balls on the lots that have them, pine needles on the older county subdivisions, and the shingle granules that always wash down in the first hard rain after a freeze-thaw winter.
Then there's pollen. It coats everything in April, mixes with rain and grit, and settles into a dense layer at the low end of the run. That sludge doesn't wash out with a garden hose from the ground. It has to be scooped, and the outlet under it has to be checked by eye.
Timing it so you only pay once
The single most common mistake is going too early. A April clearing on an oak lot looks great for about ten days, then the tassels finish dropping and you're back where you started. We'd rather book you for the last week of May and do it once properly.
There are exceptions worth knowing. If your gutters went into winter full, clear them in March regardless, because standing water and packed debris through a freeze-thaw stretch is how ice gets into a seam and works it open. If you're selling in April, clean it for the photos and plan on a second visit. And if a storm has already pushed water over the edge somewhere, that isn't a scheduling question, that's a call today.
Lot type matters more than the calendar. A ranch in the county with two mature pin oaks needs a different plan than a new build in St. Charles with saplings and .019 builder-grade aluminum on the eaves. The first needs spring and fall. The second might genuinely be fine with one visit a year for now.
What we actually do on a cleaning visit
Trough gets emptied by hand, not blown. Debris goes in a bucket and off the roof, so it doesn't end up in your beds or packed against the foundation. Every downspout gets water run through it until it discharges clean at the bottom, and if it doesn't run, we find out why before we leave.
While we're up there we look at the things that are only visible from a ladder: hangers that have backed out, a miter with a hairline opening, a section of fascia that's gone soft behind the trough, granule loss heavy enough to say something about the roof's age. You get told what we saw. Sometimes that's a repair quote and sometimes it's nothing at all, and both answers are fine.
If the pitch is off and water is standing after the clearing, we'll say that too. A gutter holding water two days after the rain stopped has a hang problem, and no amount of cleaning fixes it. That one goes on our repair list instead.
The overflow that cleaning won't cure
Every spring we get calls that start with a clean gutter overflowing anyway. The debris theory is easy to test and it's often wrong. Undersized gutter is the usual culprit: a 4-inch run on a south city two-story, or a single 2x3 downspout draining a roof plane that needs a 3x4. Valley dump is another one, where two planes concentrate a stream at one spot and it jumps the trough in heavy rain.
We measure the roof before recommending anything. If the answer is a bigger downspout instead of a whole new system, that's cheaper for you and we'd rather be right than expensive. There's more on capacity in our gutter sizing guide and on the failure itself in why gutters overflow.
Related work
Gutter cleaning
What a standard clearing includes across the metro, any season.
Learn moreHow often to clean
Frequency by tree cover, roof type and how the lot drains.
Learn moreSeasonal maintenance
The year-round rhythm, and what each season actually demands.
Learn moreMicro-mesh guards
The guard type that holds up under oak and maple litter.
Learn moreDownspouts and drainage
Getting the water that leaves the trough away from the wall.
Learn moreDoing it yourself
An honest look at what's reasonable to handle from a ladder.
Learn more
Guards, and the honest version of that pitch
Spring is when guard salespeople work St. Louis hardest, because that's when your gutters are visibly full. Here's the part that usually gets left out: a guard changes what maintenance looks like, it doesn't delete it. Micro-mesh keeps tassels and seed out of the trough, which is the whole clogging problem solved. The mesh surface itself still needs an occasional rinse, especially under pine.
Screen and foam are a different story. Under an oak canopy, screen lets the fine stuff through and foam turns into a sponge full of rotting seed, and now the clog is inside a product you can't scoop. We've pulled a lot of foam out of gutters in this town.
We also won't put guards on a system that needs rehanging. Fix the pitch and the hangers first, then decide. If you're weighing it, our comparison of guard types and the piece on whether guards are worth it both go into the numbers without the sales script.
Spring cleaning questions
When is the right week to do it?
Late May into early June for most of the metro. Go earlier and the oaks are still dropping, so you pay to clear a gutter that fills again in ten days. If your lot is mostly maple and no oak, mid-May is usually enough.
Isn't a fall cleaning enough on its own?
Not on a wooded lot. Fall handles leaves. Spring handles tassels, seeds and the pollen sludge that packs into the outlet, and that material is heavier and stickier than dry leaves, so it plugs a downspout faster.
What actually comes out of a St. Louis gutter in May?
Oak tassels in ropes, silver maple seeds by the thousand, sweetgum balls where those trees are planted, shingle granules and a layer of pollen paste at the bottom that behaves more like wet sand than like debris.
Can I just blow them out from the roof?
You can move dry leaves that way. Spring material is damp and packed, so a blower tends to push it into the outlet and build a plug where you can't see it. Clearing by hand and then flushing each downspout with water is the only way to know the line runs.
Will guards mean I never call anybody again?
No, and anyone promising that is selling. Good micro-mesh takes the clogging problem off the table and turns it into an occasional rinse of the mesh surface. Screen and foam under an oak canopy fill up and become the clog.
Where we work
St. Louis · Kirkwood · Webster Groves · Florissant · St. Charles · Full service area
Book a spring cleaning
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Other seasonal reading
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