I want to replace an entire lawn. So I need something that:
1. Will never grow taller than 6 inches tall, without any tending
2. Will spread readily, and develop strong roots
3. Will tolerate winters that get down to 0 Fahrenheit (occasionally, at least the roots)
4. Are perennial
Bonus points if it fits all of those criteria, and has edible flowers/leaves/fruits (something I can pick off without digging it up and killing it).
Thanks a bunch.
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