So is it better to water your seedlings grown in doors band your houseplants with rainwater instead of tap water? I always thought that seedlings especially needed tap water as it was more sterile.
We water our plants and animals with water from a butt, and we ourselves drink water as it comes, straight from the hillside, untreated and unfiltered except by the soil. It tastes lovely and our daughter was reared on it. When she moved to Manchester as an adult, the water made her ill and she had to get a water filter!