Weeds grow, well, like weeds, out of the cracks of the pavement with nothing but municipal runoff to keep them alive. Meanwhile I have to work tirelessly to keep my tomato and pepper plants happy and fruitful. Why do weeds dominate a garden?
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Nobody has touched on one of the primary reasons – “weeds” get millions of tries at growing. Most plants we buy as small trays or as seed packets with maybe 100 seeds. If 10% of them survive then you have 10 plants. If 10% of a weed that dropped 50,000 seeds around then you have 5,000 weeds.
The answer is a lot of desireable plants will grow in sidewalk cracks too if you wanted to waste money throwing enough seeds there. I have petunias growing in some of mine, but petunias also produce a ton of seeds.
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