Deep Water Plants - Good to Know
What’s the Difference Between Waterlilies and Deep-Water Pond Plants?
Waterlilies and deep-water plants may seem similar, but they serve different purposes in a pond. Waterlilies have large, flat leaves that float on the surface, creating a dense canopy of shade, while deep-water plants like Water Hawthorn or Brandy Bottle have more delicate, upright flowers and varied leaf textures.
Co-planting them works beautifully—Water Hawthorn flowers early in spring when waterlilies are dormant, providing early-season interest and shelter for pond life. As the waterlilies come into bloom in summer, they take over, creating a stunning, layered look with different leaf styles, flower types, and increased shade to reduce algae growth and keep the pond cool and healthy.
Where Should I Place my Deep Water Plants in the Pond?
Deep water plants should be treated similarly to waterlilies, with each variety having its specific depth requirements.
When your plant arrives, start by placing it on a pond shelf at a depth where its current foliage can float on the water's surface. This ensures the plant can breathe and transport oxygen to its roots effectively.
Gradually lower the plant as it grows throughout the season, until it reaches its recommended final depth.
Deep water plants are adaptable, thriving in shaded areas and even in ponds with gentle water movement.
How many deep water plants do I need for my pond?
4 to 5 - 1ltr plants per sqm
2 to 3 - 3 ltr plants per sqm
1 x 3ltr plant per sqm for large ponds of 20+ sqm
Deep-water plants play an important role in achieving the recommended two-thirds pond coverage for a healthy and thriving pond. Their submerged foliage helps oxygenate the water, while their floating or emergent leaves contribute to shade and reduce algae growth.
In a 6sqm pond, you might aim for 1sqm of deep-water plants alongside 2sqm of waterlilies and 1sqm of floating plants, creating a balanced mix to keep your pond cool and provide shelter for pond life.
Do I need to line my basket with hessian?
No, Finofil baskets have been designed to have a very fine mesh structure to stop soil loss.
What are your planting baskets made from?
Finofil aquatic baskets are made from 100% recycled plastic and manufactured in the UK. They can be recycled at your local recycling centre or any kerb side recycling that collects black plastic. Plant labels are recyclable.
Will carp and ducks eat my plants?
Yes! Koi and other varieties of carp find all pond plants very tasty - so we cannot recommend any plants for your pond unless they can be protected by some form of barrier.
Goldfish will nibble at oxygenators and softer leaved plants in your pond. They are omnivores so will also eat larvae, insects and tadpoles.
Wildfowl will also eat plants, we suggest buying more mature plants with established root systems and protecting the roots/rhizomes as best as you can to prevent damage from eating and nesting.