When most homeowners think about spring, they picture the first mow.
The first warm Saturday.
The first green-up across the neighborhood.
The first time the patio furniture comes back out.
But biologically, spring doesn’t begin when you start mowing.
It begins underground.
And the Spring Equinox – when day and night are nearly equal – marks an important turning point for your lawn and trees here in Kansas City.
What Actually Changes at the Equinox?
The equinox signals a shift in daylight, and that shift affects plant biology more than most people realize.
Longer days mean:
• Soil temperatures gradually begin stabilizing upward
• Microbial activity in the soil increases
• Root systems move from dormancy toward activation
• Nutrient movement becomes more consistent
Air temperature can swing wildly in March (and in Kansas City, it often does). But soil temperature is what truly drives growth.
Once soil begins consistently warming, roots wake up first – long before you see dramatic changes above ground.
And that’s why timing in early spring matters so much.
What This Means for Your Lawn
Your lawn’s performance in May and June is largely determined by what happens in March and early April.
During this transitional period:
• Roots begin strengthening
• Stored nutrients are mobilized
• Early weed seeds prepare to germinate
This is also when pre-emergent applications become critical. Crabgrass and other summer annual weeds germinate when soil temperatures reach roughly 55°F consistently. By the time you see them, prevention is no longer an option.
Equinox timing isn’t about pushing fast green top growth.
It’s about building a strong root system and putting protective measures in place before problems start.
Homeowners who wait until they “see something wrong” are usually weeks behind the biological cycle of their turf.
What This Means for Your Trees
Trees follow a similar pattern.
Before leaves expand and photosynthesis ramps up, trees rely on stored carbohydrates in their root systems to fuel early growth.
If a tree struggled last summer – due to drought stress, compacted soil, nutrient deficiency, or insect pressure – those energy reserves may already be depleted.
Spring is when that story begins to show.
You may notice:
• Smaller leaves
• Delayed leaf-out
• Thinner canopy density
The equinox period is also one of the best times to evaluate tree structure. With leaves not yet fully emerged, we can clearly assess branch unions, deadwood, and overall form – visibility that disappears once the canopy fills in.
Tree health is long-term management, not reaction. Early spring is a window for support before symptoms escalate.
Common Mistakes Around the First Day of Spring
Every year, we see the same patterns:
1. Treating the calendar like biology.
Just because it’s officially spring doesn’t mean soil conditions are identical year to year. Timing must respond to conditions, not just dates.
2. Over-fertilizing too early.
Pushing aggressive top growth before roots are ready can weaken turf long-term.
3. Ignoring trees until leaves appear.
By the time decline is obvious in full canopy, correction becomes more complicated.
4. Waiting for visible weeds.
Prevention always happens before emergence.
The Martz Approach to Early Spring
In Kansas City, early spring conditions can fluctuate dramatically. That’s why we focus on monitoring soil conditions and adjusting timing accordingly.
Our spring programs are built around:
• Condition-based scheduling
• Balanced nutrient applications
• Properly timed pre-emergent barriers
• Professional Tree Health Inspections
• Long-term plant health management
We don’t treat landscapes based on guesswork or a fixed calendar. We respond to what the soil and trees are actually doing.
March Decides May
The equinox isn’t just a date on the calendar.
It’s a decision point.
The lawns that look thick and even in late spring were prepared weeks earlier.
The trees that leaf out strong were supported before visible stress appeared.
Spring doesn’t start when you mow.
It starts underground.
If your property isn’t on schedule yet, this is the time to act.
