Preparing Your Water Lily for Planting
Planting water lilies successfully begins with understanding their needs before they even reach the water. You'll need to select a healthy specimen, often available as bare-root rhizomes or potted plants from specialist aquatic nurseries. For bare-root lilies, gently rinse away any packing material. If the roots seem dry, a brief soak in a bucket of water can help rehydrate them.
When considering potted water lilies, check that the leaves are a healthy green and free from damage. The rhizome, which is the main root structure, should feel firm. If it appears soft or has any signs of rot, it's best to choose another plant. The key is to start with a robust plant that has a good chance of establishing itself quickly in its new aquatic home.
Choosing the right container is crucial. Most water lilies benefit from being planted in aquatic planting baskets, which are specifically designed to allow water circulation while keeping the soil contained. The size of the basket depends on the mature size of your chosen lily variety; dwarf varieties might need a 1-gallon pot, while larger types can require 5 gallons or more. Avoid using standard terracotta pots, as they can leach minerals into the pond water, which is detrimental to aquatic life.
The foundation for a thriving water lily is the correct soil mix. Standard potting compost is too rich and can cloud pond water. A mix of heavy garden loam (clay-heavy soil is ideal) and sand, or a purpose-made aquatic planting compost, works best. Aim for a ratio of roughly two parts loam to one part sand, or use a commercial aquatic mix. This provides the necessary nutrients without becoming waterlogged or disintegrating.
- Select healthy rhizomes or potted plants.
- Use aquatic planting baskets sized for the lily variety.
- Choose heavy loam and sand or specialist aquatic compost.
- Rinse bare roots and soak if dry.
The Planting Process: Step-by-Step
How do you plant water lilies to ensure they establish well? Begin by placing your chosen soil mix into the aquatic planting basket, filling it about two-thirds full. Create a slight depression in the centre of the soil where the rhizome will sit. If you have a bare-root lily, position the rhizome so that the growing tip (where new leaves emerge) points upwards and slightly forward, while the root-covered end points downwards.
Gently spread the roots over the soil surface. Once the rhizome is positioned, add more soil mix around the roots and the rhizome, ensuring the growing tip remains uncovered. Do not pack the soil down too tightly; a loose structure allows for better root penetration and water flow. Leave about an inch or two of space from the top of the basket to the soil line.
To prevent the soil from clouding the pond water when you first submerge the basket, cover the surface of the soil with a layer of pea gravel or small stones. This acts as a barrier, holding the soil in place. You can also use a piece of burlap or old net curtain placed over the soil before adding the gravel, which provides an extra layer of protection against soil disturbance.
Carefully lower the planted basket into the pond. For most lilies, the water level should be such that the soil surface in the basket is about 6-12 inches below the pond's surface. The depth will depend on the specific variety; dwarf lilies prefer shallower conditions, while larger varieties can tolerate deeper water. You can temporarily place the basket on bricks or stones to achieve the correct initial depth, adjusting them as the plant grows.
Submerging and Positioning
Once in place, observe the plant for a few days. Healthy water lilies will begin to send up new leaves. If the leaves are floating on the surface, the water depth is likely appropriate. If they are struggling to reach the surface, the water might be too deep, and you'll need to raise the planting basket.
Water Lily Care and Maintenance
Growing water lilies is rewarding, but a little ongoing care ensures they flourish. Position your water lily in a spot that receives at least 5-6 hours of direct sunlight daily; this is essential for prolific blooming. Too much shade and you'll see fewer flowers and weaker growth. Ensure the planting location is protected from strong winds, which can damage the foliage.
As the water lily grows, you may need to adjust its depth. Larger varieties might require their baskets to be lowered further into the pond as they mature, often needing a water depth of 18-36 inches from the soil surface to the water surface. This usually involves removing the bricks or stones the basket was initially placed on. Monitor the plant's progress and make adjustments as needed.
Regularly remove any yellowing or dead leaves and spent flowers. This not only keeps the pond tidy but also encourages the plant to direct its energy into producing new growth and blooms. Use clean scissors or shears to cut stems at the water surface.
Fertilising is key for abundant flowering. Water lilies are heavy feeders. Use specialised aquatic plant food, typically in the form of slow-release tabs or pellets. Push these directly into the soil of the planting basket, being careful not to disturb the roots too much. Follow the product's instructions regarding frequency, usually every 4-6 weeks during the growing season (spring through summer). Over-fertilising can lead to algae blooms, so moderation is advised.
Dealing with Pests and Diseases
While generally hardy, water lilies can occasionally be affected by pests like aphids or water boatmen, and diseases such as crown rot. Inspect your plants regularly. Aphids can often be washed off with a gentle spray of water or a mild soap solution if necessary. For more persistent issues or signs of disease, consult a specialist aquatic plant supplier for targeted advice.
Choosing the Right Water Lily Variety
When you're thinking about planting water lilies, selecting the correct variety for your pond size and conditions is paramount. Water lilies are broadly categorised by their size and growth habit, and understanding these differences will help you make an informed choice. The main types include dwarf, small, medium, and large varieties, each suited to different pond depths and surface areas.
Dwarf varieties, such as 'Pygmy Water Lily' or 'Little Beauty', are ideal for small ponds, containers, or even large water bowls. They typically have smaller flowers and leaves and prefer shallower water, usually 6-12 inches deep. Their compact nature means they won't quickly overwhelm a small aquatic environment.
Small to medium varieties, like 'Marliac' or 'Attraction', are suitable for most standard garden ponds. They offer a good balance of size and bloom production. These lilies generally thrive in water depths of 12-24 inches. Their leaves will spread to cover a good portion of the pond surface, providing shade which benefits the pond ecosystem.
Large and extra-large varieties are designed for substantial ponds or lakes. These lilies, such as 'Mangkala Ubol' or 'Colorado', can have massive leaves and prolific, large blooms. They require significant space to spread and prefer deeper water, often 24-36 inches or more. Planting a large variety in a small pond will lead to overcrowding and poor performance.
Hardy vs. Tropical Water Lilies
Beyond size, water lilies are also classified as hardy or tropical. Hardy lilies are perennial and will survive cold winters in most climates, often dying back to their rhizomes and re-emerging in spring. Tropical lilies, distinguished by their often more vibrant colours (including blues and purples) and sometimes fragrant flowers, are annuals in cooler climates and must be protected or replaced each year. For most gardeners, hardy water lilies are the more practical and popular choice for long-term enjoyment.