Pink Water lilies - How to grow water lilies

How to Grow Water Lilies

Reading Time: 7 minutes

Quick Weed Facts:
Shape:
  Various, these include but not limited to star shapes, cup shaped, or pointed
Colour: Various
Family:  Nymphaeaceae 
Size Varieties: Various ( 58No) Small/Dwarf, Medium, and Large
Most Active Growing Periods: March – Sept
Plant Type:  Perennial

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    You may be wondering how to grow water lilies in your garden. Then if you are there, are a few important quick tips for ensuring you get the best growth results possible.

    Ensure you choose a cultivar to suit both the size and the depth of your pond. Due to the British weather, you should also look for a ‘hardy’ variety for our northern climate, if they are to be kept outdoors in the winter. Tropical varieties will not survive in cold water and must be brought indoors for the winter.

    Such expert advice you can get from your nearest aquatic garden centre, they will only be to glad to help you.

    Note: Our advice below is based on buying and using ‘bare’ root plants in early spring, of course you may wish to buy plants ‘already growing’ in an aquatic basket in late spring/summer. You can, however, still follow some or all these guidelines for growing water lilies in your garden.

    The first thing is to choose an aquatic basket of a suitable size to support the cultivar of water lilies you wish to grow. If you are a beginner, we suggest baskets around 60cm – 70cm in width, this is a good size to start with.

    We would also advocate the use of ‘basket’ and not a pot to place your lilies in; irrespective of whether your pond has a clay/silt bottom or a fiberglass pond. The basket, which ever size you choose should be then ‘lined’ with a ‘landscape fabric’ to stop you soil dissipating into the pond water when placed.

    Want a Different Size? Check out the Lily Sizes Below and get Baskets to Suit.

    Secondly, you need to ensure you use the right soil for your water lilies. Avoid using ordinary ‘potting mix’ as it may contain ‘additives’ that encourage the growth of algae in your pond. Instead use an aquatic compost for the best results. In addition, we suggest that when you have covered the rhizome to within 50% of the top of the basket cover the soil to the top with pea gravel to stop any fish digging at your water lily.

    Last tip, you should plant aquatic fertiliser pellets into the soil during the lily planting process and before you place in your pond.

    Water Lilly Plant Sizes and Water Depths to Gauge Basket Size

    Dwarf/small lily cultivars reach 1–2ft (30–60cm) wide, and need water 12–18in (30–45cm) deep.
    Medium lily cultivars reach  2–4ft (60–120cm) wide, and need water 18–30in (45–75cm) deep.
    Large lily cultivars  reach up to 8ft (2.4m)  wide, and need water 30in–4ft (75–120cm)  deep.

    Purple Waterlilies - How to Grow Water Lilies

    How to Grow Waterlilies: Water lilies come in many varying sizes and colours

    Planting Instructions for Water Lilies

    Now you have read our quick tips above you are ready to start planting your first water lily? Let’s proceed with the following more ‘detailed’ planting instructions.

    Once you have chosen your lily variety, proceed to fill your basket with suitable ‘aquatic compost’ to 50% of the depth from the bottom of your basket ensuring you get a good soil compaction.

    Then place your rhizome (one per basket) at a 45-degree angle with the ‘roots’ facing or even touching the edge of your basket. Ensure that your ‘basket’ is wide enough (depth is not particularly important but should be suitable for your pond depth) to allow for both the size of your preferred rhizome and the ‘growth’ of the lily; as water lilies grow ‘horizontally’ across your basket not vertically down like most plants.

    Once your rhizome is placed, proceed to cover the rest of your lily to within 1in (25mm) or so from the top of your basket with the remainder of your aquatic soil. Again, ensure good compaction, once done, remember to ‘push in’ your fertiliser pellets at this point to.  Fill the remaining space with washed ‘pea gravel’ as described above. This will lessen the chances of your fish digging out your newly planted rhizomes, that’s it! Your done with this planting up stage.

    Maybe Additionally, for that little bit of ‘extra’ protection of your rhizome you can try placing a ‘small stone’ on top the pea gravel at the rhizome base and just push it in slightly so its firm.

    How to Growing Waterlilies: Planting and Placing Your Lilies

    Placing Your Water Lilies

    Now you have completed the planting up stage place the basket so that the growing tip is approximately 3/4″ (22mm) above the surface of the water. It’s important to know water lilies need at least ‘six hours’ of direct sunlight a day to thrive and bloom.

    This is now the most important time (spring/summer) to plant your water lily. Some lilies will, however, also survive in partial shade if you pond is in a shady area; partial shade is acceptable for occasional blooms. Just ask at your aquatic garden centre which lilies are best suited for this.

    Also, when planting your new water lilies, ensure they’re placed in a relatively calm part of the pond, preferably away from any waterfalls or fountains and ensure to use the fertiliser pellets every ‘two weeks’ or so during the growing season to ensure your water lilies are well fed.

    Continued Care of Water Lilies

    Water lilies are rooted aquatic plants that grow in fresh bodies of water. The most important care tip for waterlilies is to use a pot specifically designed for aquatic plants as described above; this is an aquatic basket. Besides regular fertilisation, you should endeavour to also cut off dead flowers or trim them to encourage many more blooms.

    Water Lily Pests

    Continuing care also means keeping an eye out for waterlily pests. Some common pests include waterlily beetle, aphid, leaf spot, leaf mining midges and Brown China-mark moths.

    These pests we will cover in depth in a separate article, but briefly:

    • Waterlily Beetle can be recognised by elongated holes in leaves. These are formed by both the adult and larvae.
    • Waterlily Leaf Spot can be recognised by the ‘concentric’ circles of reddish or greyish/brown spots on the leaves.
    • Brown China-mark moths you will notice the regular rounded holes made by the caterpillars in the leaves.
    • Waterlily Aphids like other aphids will infest your lily foliage and any new growth. They leave cast ‘skins’ and sooty mould, which is a type of fungus (Ascomycete)
    • Leaf-mining midges larvae cause devastating damage to the leaves of lilies both in new or even refilled ponds.

    We advise not to use pesticides on aquatic plants as you run the risk of endangering other wildlife and pondlife they may visit; this warning also includes your fish of course. Far better to try and remove leaves, and pests by hand; only if it safe to do so of course. Ensure all ‘infested’ leaves are removed quickly to avoid further infestations.

    Some other experts advocate just ‘spraying’ your plants with a powerful water jet washer to try and ‘wash’ away larvae and adults. Your fish will no doubt love you for this method.

    Brown china-moth caterpiller holes

    How to Grow Waterlilies: Rounded holes formed in the lily leaves by the Brown china-moth caterpiller.

    More About Water Lilies and Their Varieties

    If you are looking for a unique and tropical looking plant for your pond or water garden, you are probably looking at growing water lilies right, that why you are here. These beautiful plants are not difficult to grow but they require certain conditions to thrive as we have laid out above.

    Lilies flower all summer long, provide a unique accent to your landscape, and are not only beautiful, but can also be very hardy dependant on variety.

    Water lilies have colourful flowers with some having several stamens. Others open only in the morning or evening, attracting pollinators. Water lilies produce a berry-like fruit, which ripens underwater. The leaves of some species are submerged, making them ideal for water gardens other float. Water lilies are generally perennial plants, but some species are annual and short-lived.

    When planting water lilies, be sure to plant them when the water temperature reaches around 69°F (20°C), otherwise, you will risk killing them or stunting them. Gradually lower them into the required depth of the water as the plant grows. Established water lilies can then remain at their desired depth for the rest of the year.

    There are many different varieties of water lilies that are available in the UK market. You should consult your local aquatic nursery specialist if in any doubt or shop online if you know what you want.

    Some popular varieties you may wish to consider though are:

    The Small and Dwarf Waterlily Variety, Needed water depth around 12-18in (30-45cm).

    • Candida: White flowers
    • Pygmaea Helvola: Yellow flowers
    • Pygmaea Rubra: Deep rose-pink flowers ageing to deep red

    The Medium Waterlily Variety, Needed water depth around 18-30in (45-75cm).

    • James Brydon: Rose-red flowers and purplish leaves
    • Marliacea Albida: White flowers
    • Rene Gerard: Rosy-red flowers

    The Large waterlily variety, Needed water depth around 2.5-4ft (75cm-1.2m).

    People Also Asked:

    How Long do Water Lilies Take to Grow?

    With the right conditions (full sun or shade dependant on variety) and care (pest control) waterlilies will take around 5-6 months to grow to their maximum spread and height.

    How Long do Water Lilies Last?

    Water lily flowers do not last that long generally between 2-6 days. Unless they are a nocturnal variety the flower opens during the daytime and closes at night. Once flowering is over the flower dies and gradually sinks into your pond or water feature and should be cut  and removed to encourage more flowers.

    Conclusion

    We hope you found our ‘How to Grow Water Lilies’ informative? As you can see growing these beautiful plants is not difficult.  With just a few points to remember, you will be able to grow your own lilies at home and be the envy of your neighbours.

    Don’t forget to visit our FAQ page for many more gardening tips, tricks and information on a whole host of subjects for the home and garden.