I did enjoy this piece. You have managed to capture everything a haiki should be, rather than what a lot of haikus I see around the site fail to do; that is, a haiku is focused around ideas of nature and time, and you have portrayed the feeling of the passage of time wonderfully.

For my critique, I must say that I do not think the phrase "loved it" works particularly well here. I am not sure why. Perhaps it sounds too cutting on the tongue, too harsh after the soft phrasing of the previous line (which, on that note, I adored). The imagery associated with the "seeds of new growth" from "scattered mulch" is strong and evocative. I personally see a farm or woodland, bursting with snowdrops and primrose and young saplings, ready for "Fall's children" to enjoy. Here, I see young children crunching on leaves as the cycle prepares to begin again. The imagery of this cycle is perfect.

From my knowledge, using punctuation in haiku is fine - I do it all the time, in fact - and your use of the period at the end of the second line works well to disassociate the first part of the haiku. However, like I said, I feel a different phrase would work better to finish on.

Of course, we have entirely different writing styles and I do not mind if you disagree; let me know what you think! Otherwise, I wish you the best and keep up the good work.