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Late to the game, me, once I learned the trick to garden design rules. I hadn't known or trusted garden rules deeply enough to wisely break them. That's all there is too it. Trust the rules, follow the rules, break the rules wisely. Why the bother?
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Knowing the rules, breaking the rules, creates a garden & exterior more deeply 'you'. Rules don't make every garden the same. Rules make every garden potently different.
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Adored, seeing this garden, below. In the pink. I want to know this person. Just from this pic, a tiny portion of their exterior. More, I want to see the owner's interior.
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Pic, above, here.
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Hope you realize that's what you're patio/deck must do, too. Others must see it, and want to come inside. Others must see it and 'know' who you are. Those are garden design rules !
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Garden & Be Well, XO T