Practice
Practice sets.
Twenty-four gardens with no date attached, three sets per level. They never change, so you can come back to one, and they do not touch your daily streak. Your progress in each set stays in this browser.
Easy.
Eight by eight. Every garden here can be solved with the simple steps Hint knows: neighbours, full lines, lines with exactly enough room, and a flowerbed that must spend its hedgehogs inside one row or column.
Medium.
Nine by nine. Once or twice per garden the simple steps run out and you need to look further ahead: count how the remaining hedgehogs of two flowerbeds can share two rows.
Hard.
Ten by ten. Three to five places per garden where only careful counting or a small what-if gets you through.