Ok, this is probably my bad for not laying patterns down to make the 16 square things...but when I tried this I did not know what to do about the cliffs, stream, etc....how many spaces do I count in my head if my path runs off a cliff? How many spaces is it across a river? Or do I not include the stream or the cliffs in counting out the 16 pattern spaces?
My question is, if I don't use patterns, and a certain area is ok for trees, but when I add one tree, Pelly says, "there are too many trees in one area", do I have to plant more flowers to fix the tree/flower ratio in this area or should I start chopping down trees there? I read somewhere that if you have a large number of trees in one area, you have to then have a larger number of flowers in the same area. Is this right?
I have so many trees in my town, they are getting in the way.
My question is, if I don't use patterns, and a certain area is ok for trees, but when I add one tree, Pelly says, "there are too many trees in one area", do I have to plant more flowers to fix the tree/flower ratio in this area or should I start chopping down trees there? I read somewhere that if you have a large number of trees in one area, you have to then have a larger number of flowers in the same area. Is this right?
I have so many trees in my town, they are getting in the way.

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I have filled in most of the empty looking spaces in town with a tree or a couple flowers, so don't know why Pelly says this/don't know where the problem is?
Maybe I am overcomplicating this... *grin*
We had a lot of houses and rivers down there too, so it looked like the most crowded area by the time we were done.
But one thing I did learn, is that they'll keep telling you there's too many trees if you have 19+ trees in an acre.
This guide really helped me as far as getting the right tree to flower ratio
http://accf.wikispaces.com/Perfect+T
I'm not a big fan of trees; they can make it hard to find weeds and dig spaces. I've got "perfect town" status, but I haven't planted more than five or six trees.
What I have done - and this has made me pretty happy - is buy and plant every single flower at Tom Nook's store, and do it daily.
I haven't laid down 16x16 square maps, and while this is a fine idea, I decided it was too much trouble for me. I just looked for "bald spots" - areas with no flowers or trees, and started my serious planting there, then moved on to other areas when I started to think, "...hm. Looks bare."
Part of what helped this process is that, when I replanted my standard trees with foreign fruit trees, I got in the habit of marking each one with a flower, so I could tell, while fruits were regrowing, which trees not to chop down.
A nice side effect of mad flower planting is that I got a lot of hybrids as a matter of course. Also, squares with flowers don't lose snow/grass as quickly, so the flowers are anchoring a lot of areas that I want to keep intact.
http://www.kurtboyer.com/guides/AnimalC
Once I could see where the boundaries between acres lay, I could more easily plan where to plant trees and flowers.
The tree/flower ratio is complex - initially one tree counts as two flowers, and you want to score 27 per acre ... but if you plant more than 12 trees, you need to increase the flowers beyond the 27 point total.
I'm sure if you google perfect town, you'll find a chart that tells you how many flowers you need for each acre, given the number of trees present.