this skill was completed awhile ago, what is suppose to happen when it is? I don't think anything has changed, are you able to clear an entire plot at once? There isn't a new opion in garden menu, don't know if I should bring it up or just wait. Maybe it's just delayed. :/
when you get that skill you can use the potions to harvest, clear, water, and seed entire gardens at once.
[honestly, i thought getting a 'master' skill after learning so many below it would be a bigger deal, but alas. rather disappointing but still somewhat useful as i can make the potions.]