Today's featured plant Eichhornia crassipes. Water Hyacinth
The GOOD ... A lovely little floating plant, many are lured into the easy peasy planting, just float in the water, no potting required!
I like to have just one or two floating in with the goldfish because the gold fish love to lay their eggs in the long feathery roots. I can then collect the odd plant for the eggs as my husband likes to have "baby" fish to "overfeed" in the house sometimes. (Husband always overfeeds, must watch him like a hawk!) If the water is very hot they perform very well, spreading quite fast. It can help provide shelter for fish from preditory birds and from the sun. The plant also performs well in a vegetative filter. Overwintering is possible indoors with enough light and temperatures above 70 F (21 C). Some people say if your "Lucky" you may see a very lovely flower!
The BAD.... this plant can grow very very fast and quickly take over the pond. New and unsuspecting pond people relish in their quick success, not realizing that the plant may be starting to "smother" the pond! This plant is outlawed in some southern parts of the states, as it can take over lakes and ponds, like the weed that is really is!
The UGLY... this plant is found in very tropical zones, getting it to bloom can be very easy but not a good thing for koi and goldfish, which are really "cold fish" as they are NOT tropical, and tend to do poorly if the water is too warm. All that is required to make this plant bloom is full sun, very very warm water and pack the floating plant into the pond until it is nearly falling out of the pond! Good for the plant, really bad for the fish. The plant will grow to every inch of your pond if you let it, acting like a blanket and smothering the pond. In small ponds this can be a killer! Gases build up, pond quickly overheats and the oxygen levels begin to really drop off and DEAD fish are the result. If you have seen this plant bloom, your water is way to warm and you have way too many and you should be pulling them out like the weed that they really are and chucking large amounts!
Been there, done that, killed some of my fish off, long time ago! Hoping some people will learn from my past mistake, plant sedges instead, they grow tall and will shade the pond better without smothering the surface!
Below is an old picture from 1996 that year I had a small pond by itself where my bottom pond now is. It was a very hot year and the pond was in a very hot spot and couldn't get the fish to live in that pond, I had even hooked up a whisky barrel with a liner and had that drop into the pond and still the water was too hot and smothered the pond. Had really nice blooms though later that year. This old pond is now in the front yard.