Water plants are dramatically different to normal plants. Introduce the water plants by choosing garden plants that blend in with your marginal plants Soil nutrients constantly leached into pond water could result in green water. To overcome this, retain the media (soil) by placing gravel on top of the soil in the pot. Terra cotta pots work well in ponds. The sun can also cause the water to go green. Water lilies grow at the base of the pond. The valuable cover of the lily leaves shade the algae out in summer. Try and cover a third to a half of your pond with water lilies. You need one lily for every one and a half to three square metres of pond surface. Grow marginal plants along the edges of your pond. Fill a third of the circumference of your pond with marginal plants Marginal plants include: Iris laevigate, lobelia fulgens, Mentha aquatica, Pontederia Cordata. Oxygenating plants (submerged plants), provide underwater foliage.
These plants use up the waste nutrients in the pond, and starves the algae of nutrients. Use five bunches of oxygenating plants for every square metre You can get these plants from pet shops that sell fish and aquarium supplies Oxygenating plants include: Elodea densa, and Ranunculus peltatus. Floating plants can be attached to two empty plastic cool drink bottles You can also get floating pots from your local nursery. Introduce one for every one to one and a half square metres of surface area A good floating plant is Azolla spp/Lemna. Plant bog plants (moisture-loving plants) in damp soil near the edge of the pond or a constructed bog garden. Most bog plants prefer to have only their roots in the water, Consider a bog garden as part of your garden pond design. See our page on how to build a pond for an easy way to build and integrate a bog garden into your garden pond design. Treating the Dreaded Algae Problem Algae are single celled plants. Spores are present in the air and will colonize any new body of water They are rarely harmful to water-life, but are unsightly. In severe cases they may cause problems with the health of the fish.
There are a variety of different algae that will colonize a pond, from thin long strands to floating clumps. Algae control can be done by obtaining a natural balance using a pond filter, an ultraviolet light purifier and as a last resort an algaecide. The natural balance consists of starving the algae of light and nutrients. Best form of algae control is a correctly balanced pond with enough plant material to screen out the sunlight and prevent the growth of algae A mesh bag filled with barley straw can assist in algae control. The silicates in the straw bind nutrients, such as phosphates. The straw seems to promote as organism that feeds off the algae. Straw needs to be replaced on a regular basis as it will start to decompose and pollute the water. I suggest you replace the straw every six months. You can buy barley wheat from your local health shop. Enjoy your Pond Doing a garden pond design for your garden is really worth the effort. I have sat on my patio on many occasions and just marveled at the dragonflies, butterflies and birds visiting and enjoying the water. It is so therapeutic and a special meditation retreat for me.
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