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In the case of a stream, the water can freeze in the streambed before it can return to the pond. If your pond completely freezes over, water from the waterfall can spill across the pond surface and out into the surrounding garden. However, during a prolonged freeze pumps should be turned off. In short freezes, a running waterfall can successfully keep an open hole in any ice that forms on the pond surface. You may choose to remove your pump prior to cold weather, but in our mild climate, you can enjoy water features year around. If you did not see a particular plant that you purchased on this list, chances are good that it is hardy and will go dormant for the winter before reappearing in the spring. Due to their high light and water temperature requirements, it is best to treat them as annuals and remove them from the pond in fall. The most popular are Eichhornia crassipes (Water Hyacinth) and Pistia stratoides (Water Lettuce). Sagittaria montevidensis: Aztec Arrowhead.Cyperus haspen viviparous: Dwarf Papyrus.
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Many tropical plants can also make good houseplants through the winter given the right conditions including water and light. For this reason, they require a protected environment such as a heated greenhouse where they can receive necessary warmth and light to continue growing. Tropical water plants don’t go dormant in the winter.
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The following is a list of semi-tropical plants: It is important not to let the plant completely dry out. Although many pond owners simply drop them to the deepest section of the pond (at least 18” deep), it is safer to bring the plant into an unheated garage or cold frame. Semi-tropical plants are those that will winter over with some protection. These varieties should be dropped deeper so that the top of the pot is at least six inches under the water to protect the plant from freezing. These include Saururus cernuus: Lizard’s Tail and Pontaderia cordata: Pickerel. There are a few hardy plants that require some protection. In our Willamette Valley climate, a depth of 18-24” is usually sufficient. Hardy waterlilies will winter over as long as their crown does not freeze. The majority of plants we sell fall into this category, including hardy waterlilies. Hardy plants are those that will winter over in your pond without any special care required, then will regrow in the spring. There are three main categories of pond plants: hardy, semi-tropical, and tropical. While not visually appealing, the netting only needs to remain over the pond for a few weeks to catch most of the leaves. This can be accomplished with netting to cover the surface of the pond. Preventing further debris from falling into the pond is another area not to be overlooked. A simple skim net will allow you to remove any surface debris and material that has collected on the bottom. Any debris or decomposing plant material that accumulates in the pond can not only be harmful to the health of your fish, it can also feed algae when spring arrives.
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Winter Pond Care Special Considerations for End of Season Care Fall Cleaningįall is an excellent time to catch up on maintenance left over from summer.