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What's insane to me is how much certain plants will grow in tap water with zero regard for their nutritional requirements. I frequently propagate houseplants by
by adriand 5y ago
What's insane to me is how much certain plants will grow in tap water with zero regard for their nutritional requirements. I frequently propagate houseplants by putting cuttings in a glass of water and sometimes I get lazy and don't re-pot them for weeks or even months. And they will often grow very well - shooting out tons of roots but also additional leaves and stems.
- GhettoComputers 5y agoThat’s the same as saying there are animals that have more biological fitness (mice) than others (pandas). Carbon and nitrogen come from the air, water will hydrate them, but most plants have expectations. Orchids for instance can be artificially bloomed with phosphorus but if it was dormant people would just think it’s dying, as if natural cycles of less bloom was a failure of the plant’s growth!
- soperj 5y agoBottoms of green onions to me are the weirdest. You can get multiple cuttings just from water.
- 71a54xd 5y agoHard water is actually one of the worst things you can give to expensive house plants, distilled water is by far the best option to prevent root calcification and ph swings.
- lathyrus_long 5y agoYou can also acidify the water down to a reasonable pH, though even phosphoric acid is somewhat dangerous and the best choices (nitric or sulfuric) aren't something I want in my apartment. Amateur hydroponic growers often use reverse osmosis water, somewhat wasteful but cheaper than distilled. You can get RO systems designed for aquarium use with no pressure tank at the output and just let them slowly fill a barrel or tote, over hours or days.
- soperj 5y agoDon't know why I got this reply? Green onion bottoms that normally would go into the compost aren't expensive, and the tap water here is very soft.
- GordonS 5y agoWhat about tap water from countries where the water is soft, like Scotland, Ireland or Norway? Or is that still too "hard" for plants?
- lathyrus_long 5y agoI think that's not by accident. Typical houseplant species seem to be selected for their ability to look good with minimal fertility. That makes them easier to grow, but harder to grow optimally. For example, mint will quickly indicate any deficiency in its leaf appearance, but pothos / devil's ivy will mostly just grow slower.
- BurningFrog 5y agoI believe it takes most of the material for air, not water.