Well, he may be biased. It doesn't help that the Void's done a fine job of reminding him how often he does all the work and so many other people just screw around (back in England, at least, but why not apply that here as well?). Regardless, that isn't being questioned, which means he won't explain it further and instead raises an eyebrow at the seedling Steven's managed to turn the energy into.

"Interesting choice," he comments, neither approving or disapproving, just... saying it. "I suppose plants really are in your area of expertise these days."