From the top of a Houston freeway interchange at noon in April, the city looks less like concrete than like a forest with towers poking through, a canopy of oak, pine and elm rolling out to every horizon. Down under that green ceiling are the yards, and Core Landscape Group does landscaping and lawn care across Houston, one property at a time. April growth here is relentless, the lawns greening hard after the last cool snap and the beds filling in before anyone has finished planning them. A landscape kept in step with that surge looks deliberate rather than overrun, with edges holding their line and plantings given room to breathe. Seen up close, it is the same green the freeway shows, only near enough to touch.