Cardinal flower Lobelia cardinalis red - Marsh plant, waterside plant

Lobelia cardinalis

Cardinal flower Lobelia cardinalis red - Marsh plant, waterside plant

Lobelia cardinalis
Red water plant
What a stunner! The cardinal flower (Lobelia cardinalis) adds is a cheerful addition to the garden. The wetland plant has fiery red flowers. An easy plant that thrives anywhere. The aquatic plant is a waterside and marsh plant. We can plant the plant along the edge (bank) of our pond. Or we can plant the plant up to 40 cm deep in the pond. Plant Lobelia in the spring. The flower blossoms in the summer.
We prune the plant slightly to shape it with a pruning shear. We remove old leaves and dirt. To encourage good growth, we add minerals to the pond water and ensure that the water's hardness level (pH value and calcium to magnesium ratio) is maintained. We make sure to plant Lobelia in a sunny spot.
Let me know when the product is back in stock.

The product you are looking for is out of stock. Enter your email address and we'll let you know as soon as the product is available again. This normally does not take very long.

Alternatively, take a look at our alternatives in the Pond plants category

Payment methods accepted
Free afterpayment with Klarna
Sustainably packed with recycled packaging material
Fresh from the nursery
Delivered within 7 days
Largest product range of organic plants
Cardinal flower Lobelia cardinalis red - Marsh plant, waterside plant
Cardinal flower Lobelia cardinalis red - Marsh plant, waterside plant
Cardinal flower Lobelia cardinalis red - Marsh plant, waterside plant
Cardinal flower Lobelia cardinalis red - Marsh plant, waterside plant
How we measure

From the bottom of the nursery pot to the top of the plant.

Seasonal effects 

The appearance of water plants changes between seasons. From a bare plant lying dormant in winter to fresh greenery in spring, in full bloom during summer to leaves changing colour and dropping in autumn. This is a natural process courtesy of mother nature. Our plants will be delivered accordingly. 

Latin name: Lobelia cardinalis
Delivery type: Supplied as container plant
Guarantee: 6 months growth and flowering guarantee
Color: Red
Preferred location: Sun, Half shadow
Green stayer: Yes
Leafs all year: No
Hardy plants: Yes
Self polinating: No
Edible: No
Naturalizing: No
Scented: Not Scented
Grafted: No
Cutting flowers: Yes
Flowering: June - August
Growing Height: 80 - 100 cm
Planting depth: 15 cm

Abundantly flowering cardinal flower (Lobelia cardinalis) makes a great pond plant - best planted in a pond basket. Line the basket with hessian and use special pond soil to fill it. Plant the cardinal flower in the basket and fill it up with the special soil. Cover with the edges of the hessian, or straw and a layer or gravel. Place in the pond so that the top of the basket comes to just below water level or at a maximum 15 cm deep. Add bricks underneath the basket if it's otherwise too deep. Full sun or part shade. Best time for planting is May-June.
This plant looks lovely in a border as long as it retains moisture well. A plant like this with lovely red blooms and red tinted leaves will be very conspicuous.

Mixing Cardinal flower with other plants.

The very noticeable red tinted leaves of the cardinal flower (Lobelia cardinalis) will contrast wonderfully with the edge of your pond. This pond plant mixes wonderfully with Butomus umbellatus (flowering rush) and the arum lily (Zantedeschia aethiopica). Wild cardinal flower (Lobelia cardinalis) grows along riverbanks and other marshy spots but even in our drier borders this abundant flowerer will thrive if you water it sufficiently!


The cardinal flower (Lobelia cardinalis) is a strong plant for the riverside/pond edge and will grow anywhere really. Cardinal flowers will certainly flower in full sun. Remove dead flower heads in the autumn. Split a too large clump in May. Just cut the whole cardinal flower root system into smaller pieces and replant (some of) them.

Keeping Cardinal Flower (Lobelia cardinalis) Over The Winter

Cardinal Flower (Lobelia cardinalis) dies back in the winter. As long as the roots remain under soil (or water), the plant will survive. Cut hard back in early spring and you will soon see new shoots appear, ready to treat you to some new flowers in the summer.


Cardinal flower (Lobelia cardinalis) originated along riverbanks and other marshy spots in the Americas.
Cardinal flower (Lobelia cardinalis) has recently been reclassified under Campanulaceae.


Shopping Cart


Product title

1 x £29.95


Check Out

Choose your country

  1. België België
  2. Belgique Belgique
  3. Deutschland Deutschland
  4. France France
  5. Nederland Nederland
  6. Österreich Österreich
  7. Schweiz Schweiz
  8. Suisse Suisse
  9. United Kingdom United Kingdom