Dividing and Repotting Hardy Water Lilies
Hardy water lilies should be divided every two or three years depending on the plant container size. For the average to large size water lily, a five to seven gallon container is ideal. The best container will be shallow and wide. Small water lilies can be potted in a three to five gallon container.
Begin by removing the soil from the water lily using a water hose to expose the rhizomes. Select the best looking piece with good growth showing and cut to about three inches long, discard the remainder of the plant. Trim away excess roots and any damaged foliage from the selected piece.If the water lily is to remain unpotted for any length of time, keep it in the shade with damp paper towels or newspaper covering the plant.
Prepare the container by filling about three fourths full of aquatic planting soil (clay loam is ideal) and add ten grams of a good fertilizer such as 10-20-10 for every gallon of soil.
(A Porous Fabric Pot is shown at left, these come in three sizes; 10" x 8", 14" X 12", & 16" X 12".)
Mound some soil against one side of the container and place the rhizome at a 45 degree angle with the cut edge against the pot and the growing point at the level the top of the soil will be. Add more soil to within a couple of inches of the top of the container. Firm the soil in place and add about one inch of pea gravel to cover the soil keeping it from covering the growing point of the plant. Gently add some water to the container and then slowly lower the plant into the pond.
If you place the plant just a few inches under the water for the first few weeks, you will get faster growth. After this, place the plant at the proper growing depth (12 to 18 inches of water over the top of the plant). Fertilize the water lily every month with the same amount of fertilizer during the growing season.
Lotus come in several sizes from dwarf types that will grow in a two or three gallon container to the standards which are better off in a twenty to thirty gallon container. Fill the container with the same soil that you would use for a water lily and fertilize with 5 to 10 grams of tablet fertilizer per gallon of soil. Place the tuber with the cut portion against the edge of the potting container. Place a stone on the tuber to hold it in place and add more soil but do not cover the growing point. Cover only with a couple of inches of water until the plant is growing well and then it can be lowered to several inches of water over the pot.Standard lotus that are planted in too small of a container will not bloom well. After the lotus are well established they can be fertilized every month during the growing season.
The Water Garden sells several types of lotus in our brick and mortar store but do not ship them because there is a large mortality rate. If the growing point is broken during shipping or planting then the plant is likely to die. Water that is too cold when the lotus is potted can also kill the plant. Lotus are hardy and should come back year after year.
Lotus do not do well here in Idaho
Hardy Lily-like Aquatics & Tropical Lily-like Aquatics
These plants grow similar to water lilies. They are rooted in a pot several inches under the water but the foliage grows to the surface and floats. Pot the same way as tropical water lilies except most are much smaller and only need a one gallon pot or an 8" x 10" fabric pot(see the "Plant Supplies" section of the shopping cart).Use one fertilizer tablet every 4 - 6 weeks. Lower the container to 6 to 12 inches of water over the top of the pot. Some of these are hardy and will winter over, others are tropical and are treated as tropicals.
Hardy Shallow Water Plants & Tropical Shallow Water Plants
Marginal plants should be planted in individual containers of approximately 10 to 14 inch fabric pots (or 10 x 6 to 12 x 7 3/4 inch plastic pots). The marginal plants which are grown in 2 inch net pots should be planted without removing the net pot so as not to damage the roots. Plant as you would the lilies in a loam garden soil, but when adding fertilizer tablets, use 1 tablet for each gallon of soil. These plants should be fertilized about every 6-8 weeks. Marginal plants should be lowered to a depth of only 2-3 inches. They grow out of the water and are usually found at the water's edge.
Hardy Floaters & Tropical Floaters
These plants require no planting. Simply place them in the water and they will grow. Many floating plants desire tropical temperatures and cannot tolerate a frost.
All ponds should have underwater plants to aid in maintaining clean and pure water. These plants help prevent algae growth. These plants can be potted in one gallon containers with pea gravel to hold them in place or they can be weighted and dropped to the bottom (The Water Garden sells Anacharis). Completely submerge these plants to a depth of at least 12 inches.