Lobelia cardinalis Pond Marginal Plant
Lobelia cardinalis Pond Marginal Plant
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Frequently Asked Questions
What's the difference between the 1 litre and 9cm pot options?
What's the difference between the 1 litre and 9cm pot options?
The 1 litre option is a single plant already growing in its own 1 litre mesh aquatic basket, ready to plant. The 9cm pot option is a pack of three plants, each supplied in a 9cm pot with no basket, so you'll need to pot each one into a mesh basket yourself before placing it in the pond.
How deep should I plant it?
How deep should I plant it?
Keep newly planted stock no deeper than half (1 litre) or a third (9cm pot) of the plant's maximum recommended planting depth of 0-15 cm while it establishes.
Is Lobelia cardinalis safe around pets and children?
Is Lobelia cardinalis safe around pets and children?
It's listed as harmful if eaten, so it's worth keeping that in mind for ponds that pets or young children can reach.
How much care does it need?
How much care does it need?
Very little once established. Trim to keep it tidy, but leave the foliage to die back naturally over autumn and winter, as this helps the plant form its flower buds for the following year.
Lobelia cardinalis suits pond keepers after a strong flash of colour right at the water's edge. Positioned as a marginal, it gives the margin a run of red blooms set against dark green foliage, creating a focal point from late summer. Buy it as a single basket-grown plant or as a pack of three young pot-grown plants, so you can match quantity to the space you're planting.
Lobelia cardinalis is a marginal pond plant that holds the RHS Award of Garden Merit. Positioned at the water's edge, it gives the margin a mirrored flash of red flower spikes set against its green foliage.
It suits pond keepers building up colour along the margin, and it gives that part of the planting a strong red focal point once the flowers open.
What you get depends on which option you choose. The 1 litre size supplies one plant already growing in a 1 litre mesh aquatic basket, ready to lower straight into the pond. The 9cm pot, pack of 3, supplies three individual plants, each in its own 9cm pot, which will need potting into a mesh basket before planting.
What sets this plant apart within a marginal planting is the combination of slow, compact growth and its RHS Award of Garden Merit rating. Maintenance stays light: trim to keep it tidy, and let the foliage die back naturally over autumn and winter, since this is what triggers next year's bud formation.
| Specification | Detail |
|---|---|
| Sun/Shade | Full sun to part shade |
| Flowers | August & September |
| Colour | Red |
| Growth rate | Slow |
| RHS AGM | Yes (RHS Award of Garden Merit) |
| Care instructions | Little maintenance is required. Trim to tidy but leave foliage to die back naturally to encourage winter bud formation. |
| Harmful | Harmful if eaten |
| What's included | 1 litre: one plant in a 1 litre mesh aquatic basket. 9cm pot, pack of 3: three plants, each in a 9cm pot. |
| Height | 80-100 cm |
| Planting depth | 0-15 cm |
Delivery information
These plants are delivered to selected UK mainland postcodes.
Delivery charges for these plants
- £6.00 for plant orders weighing up to 1.9 kg in total.
- £9.60 for plant orders weighing over 1.9 kg, up to 30 kg.
This charge covers the plants in your order. Other items in the same order may be delivered separately, with their own delivery charge.
Delivery is not available to certain postcode areas, including parts of Scotland such as the Highlands and Islands, and other restricted locations, including Northern Ireland, the Isle of Man and the Channel Islands.
The delivery options and charges available for your address are shown at checkout.
From October to February, orders are dispatched on Tuesdays only. Plants ordered outside the growing season may arrive cut back.
Express Delivery is not available for these products.
Flexible payment options are available at checkout.
You can choose to pay in full or spread the cost using PayPal Pay Later or Shop Pay, depending on eligibility.
