Considerably smaller than normal Lobelia cardinalis
Roundish leaves
Also suited for nano tanks
Forms a compact group
 
Lobelia cardinalis 'small form' is a very interesting cultivar of the larger-growing standard form of L. cardinalis. It can be discerned from the latter by its rounder, coin-shaped leaves and the far smaller overall stature.

Lobelia cardinalis 'small form' is rather undemanding. Besides sufficient light (0.5 watts per liter) it only needs CO2 injection for optimal growth regarding size, colour and growth rate. A good supply of micro- and macronutrients should be assured, too (NO3 10-20 mg/l, PO4 1-2 mg/l).

A good nutrient supply, the addition of CO2 and sufficient light result in a very bushy habit and nice green colour.