Skip to product information
1 of 6

Lesser Spearwort | Ranunculus flammula

Lesser Spearwort | Ranunculus flammula

Bright yellow flowers from June to September, perfect for UK pond margins and supporting pollinators.

Pot size

SAVE £10 when you buy 1ltr - Pack of 3

Regular price £15.00
Regular price Sale price £15.00
Sale Back in 2025
View full details

Lesser Spearwort (Ranunculus flammula) is a delightful UK native perennial, perfect for pond margins and boggy areas. This low-growing plant produces a profusion of small, bright yellow, buttercup-like flowers from June to September, creating a cheerful addition to naturalistic water garden settings.

Its creeping growth habit and lance-shaped green foliage make it ideal for ground cover around pond edges. Thriving in consistently moist to wet soil or shallow water up to 10 cm deep, Lesser Spearwort is a valuable plant for supporting pollinators and providing cover for emerging pond amphibians.

Extremely hardy, it will endure the harshest UK winters, providing reliable beauty and ecological benefits year after year. A perfect choice for enhancing pond biodiversity and visual appeal.

Collapsible content

Plant essentials

Key Characteristics:

  • Height up to 30cm
  • Spread: 30cm to 60cm (Medium Growth)
  • Growth Rate: Medium
  • Depth: 0cm to 10cm
  • Flower Colour: Bright yellow, buttercup-like blooms
  • Growth Habit: Creeping perennial with lance-shaped leaves
  • Foliage: Narrow, lance-shaped green leaves

Additional Information:

  • Common Name: Lesser Spearwort
  • Position: Full Sun/Part Shade
  • Soil: Moist to wet, suitable for pond margins and boggy areas
  • Flowering Period: June to September
  • Hardiness: Extremely hardy; tolerates below -20°C. (H7)
  • UK Native 🇬🇧 | Supports Pollinators 🐝 | Loved by Amphibians 🐸

Dispatch Information:

  • Normally Available From: April

Your Plant At Arrival

Your marginal plant will arrive in a Finofil Aquatic Basket, pre-planted with aquatic soil and a slow-release fertiliser. Just pop straight into you pond upon arrival!

Aquatic Basket Measurements:

  • 1ltr - Square pot (11cm wide by 11cm high)
  • 3ltr - Hexagonal pot (18cm wide x 16cm high)
  • 5ltr - Square pot (24cm wide x 14cm high)
  • 9cm plants arrive in solid pots and will need repotting into aquatic baskets.

How to Grow

Growing Instructions: Place the plant on a marginal shelf at the recommended depth. Allow 5 x 1L plants per linear metre or 3 x 3L plants per linear metre.

Growing Tips: Its creeping stems may root at nodes, providing excellent natural ground cover.
To manage spread, monitor its growth regularly, as it can self-seed in ideal conditions.

Care & Maintenance

Pruning: After flowering, remove spent blooms to encourage prolonged flowering. In autumn, trim back foliage to the crown to keep the plant tidy and prepare it for the following season. Divide clumps every 3–4 years in spring to promote healthy growth and prevent overcrowding.

Pests/Diseases: Lesser Spearwort is generally resilient. However, care should be taken when handling the plant, as its sap may cause skin irritation. Wear gloves during planting and maintenance. Ensure good air circulation to prevent fungal issues during humid conditions.

Marginals - Good to Know

How Deep Should I Place My Marginals?

The planting depth depends on the variety. Check the product page or the care label included with your plant for specific guidance.

Depth is measured from the top of the pot to the water’s surface.

Most marginals are fine placed 1cm to 2cm under the waterline, just enough to hide the aquatic basket.

How Many Marginals Do I Need?

Measure the length of your marginal shelves and then allow:

  • 1ltr Plants: 5 per linear metre
  • 3ltr Plants: 3 per linear metre

Tip: Leave space between plant varieties to prevent dominant species from taking over. For more details, see our Planting Guide.

Do I Need to Line My Basket with Hessian?

No, Finofil aquatic baskets are designed with a fine mesh that prevents soil loss. Adding a liner is optional but not necessary.

What Are Finofil Baskets Made From?

Finofil aquatic baskets are made from 100% recycled plastic and manufactured in the UK. They can be recycled at local recycling centres or through kerbside collections that accept black plastic. Plant labels are also recyclable.

Will Carp or Ducks Eat My Plants?

Carp (inc. Koi): These fish find pond plants irresistible! If you have carp, we recommend protecting your plants with barriers.

Goldfish: Goldfish may nibble on oxygenators and softer plants but generally cause less damage. They also eat insects, larvae, and tadpoles.

Wildfowl: Ducks and other birds may eat plants or damage roots while nesting. Mature plants with strong root systems are more resilient, but consider protecting roots/rhizomes for added security.

Ordering, Shipping & Returns

What is a Pre-Order?

Pre-ordering reserves a plant that is still growing and not yet ready to ship. Payment is taken at checkout to secure your plant, and shipping happens once the plant is well-rooted and ready.

Ordering Tip!

Many customers prefer to place two separate orders when ordering early in the season.

  1. One for plants available now.
  2. One for pre-order plants.

This ensures there are no delays, and you can enjoy your ready now plants sooner.

Read More about pre-orders


Shipping Prices

Plant Orders:

  • Standard Delivery: £6.00.
  • Large Orders (e.g., 30L Waterlilies): Pallet delivery, cost based on weight and postcode (email for a quote).

Highlands & Islands:

  • Small Orders (<1.8kg): £6.00.
  • Standard Orders (>1.8kg): £25.00.

Soil & Gravel:
Additional charges for multiple bags may apply. Email for a quote if not calculated at checkout.

Container Ponds:
Shipping starts at £30. Prices are calculated at checkout.

Note: We cannot currently ship to Northern Ireland, Republic of Ireland or Europe.

Read More about delivery prices


Couriers & Delivery Schedule

Couriers Used:
Royal Mail, APC, DX and Parcel Force, and Pallet Delivery services (for large orders and 30L plants).

Shipping Schedule

  • Aquatic Plants: Dispatch Schedule varies dependant on season.
  • Garden Plants: Dispatched twice weekly on Mondays and Wednesdays. 

If you need any help, please email us - info@plantsforponds.co.uk

 


Returns

Unpacking Your Plants

When your plants arrive, please unpack them carefully:

  • Plants are packed in protective plastic bags. Check if any stems, leaves, or flowers are stuck to the inside of the bag before removing it.
  • Gently peel off any stuck parts before removing the plant to prevent damage.
  • Minor soil displacement or damage to leaves/stems during transit is normal and won’t affect the plant’s recovery.

If you’re concerned about your plants, take photos and email us, and we’ll assist you.

Damaged or Incorrect Items

If your plants or items arrive damaged, or you’ve received an incorrect item:

  1. Take clear photos of the packaging and damaged items.
  2. Email us with your order number (starting PFP) and the photos.

We’ll resolve the issue as quickly as possible.

Returns of Plants/Molluscs (Non-Faulty)

Due to the perishable nature of plants and molluscs, we are unable to accept cancellations or returns for these items. If you are unhappy with your plant or mollusc, please take photos and email us with your order number (starting PFP).

For more details about returns and our full policy, please visit our Returns Policy

 

Grown in the UK

Aquatic Plants

All our plants come from a UK family run aquatic nursery, established over 50 years ago.