Thinning You Can Actually Use, and a Harvest-Timing Trick
NC State Extension makes a genuinely kale-specific point most spacing content skips: seedlings pulled at thinning time don't have to be thrown out -- "plants removed at thinning can be transplanted to adjacent areas." That's a real option for kale precisely because, unlike carrots, it doesn't rely on an undisturbed taproot to develop properly.
Utah State University Extension gives a concrete, checkable thinning trigger -- once seedlings reach 3 to 4 true leaves -- rather than a vague "when crowded" rule of thumb.
Why Spacing Matters for Kale
Kale gets noticeably bushy at maturity, which is exactly why between-row spacing needs more room than the in-row figure suggests -- crowd the rows and you'll be fighting your way in to harvest by midseason.
One piece of kale-specific timing advice worth knowing even though it isn't a spacing rule: NC State Extension states plainly that "for sweeter-tasting leaves, wait to harvest until frost or cold weather arrives" -- a light frost is recommended, not just tolerated.
