Hot wether leads to dry water of plants and lead to drying of plants 
cold wether will freeze the water inside plants so cells will burst from the expansion of water causing the plants to brown, wilt, and die.
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The both weathers cause harmful effect on plants 
winter -in winter the gone frozen and can die

summers- in summers if they don't get water so they get dry and leaves of the plants                       starts falling down.
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