I think the name is solid and reflects your concept in a strong way. Nice study for logo type. I'd be curious to see what it looks like when a little more personality is brought into hand lettering (maybe veering slightly away from just handwriting and turning more custom). Just to look. Do you think "spectrum" is better shown as a smooth gradient, or the more separated color dots? Might help to define "garden" in this context. Seems like you're putting your own spin on it. Could be nice for that to fuel the visual styling of the logo. Nice stuff, keep going.