What kind of plants are you looking for?
And what kind of lightning do you have?
In my experience it is easier to keep plants on
sand or
very small gravel.
These are some plants which are easy to keep with low lightning, no co2 dosing and other fertilisers:
Vesicularia dubyana (java moss)
Microsorum pteropus (java fern, very slow growing)
Anubias species (also very slow)
Cryptocoryne species (last slow grower

)
Shinnersia rivularis (english name?)
Hygrophila polysperma
Vallisneria species (IMO Americana, Asiatica and spiralis are most usefull. and especially Gigantae is NOT usefull since it can grow up to 3 metres

)
Echinodorus species (got them small, big even red!)
Heteranthera zosterifolia (something like starweed? very fast grower, very decorative)
Rotala rotundifolia (I love this one. Low light is fine, but with stronger lightning it will easily become pink/red. this plant even grows downwards!)
Nymphaea lotus (nice plant, red and green species. you can keep them small by cutting of the big leaves. you can keep them low by cutting off the leaves which grow to the surface. But for channa's these surface leaves can provide great cover.)
For Cryptocryne sp., Echinodorus sp. and maybe for the Nymphaea sp. you'll have the fertilise the bottom with red clay (buy at pet store, dont use clay from your garden).
Don't use anything but clay in your bottom. Some people use organic fertiliser in their bottom, but this will always rot over time, resulting in algae plagues.
For my tanks I use
bare sand. I insert some clay tabs in the bottom near the plants that need them.
Low light (15w for 72 liters), non-co2, no fertilizers and very low maintenace tank:
http://www.venividivissie.org/gallery/image.php?album_id=1134&image_id=28465
(showing Valisneria sp. Cryptocryne Walkeri, @ kinds of Java fern and rotela sp.)
More light (60w on 172 liters), co2 addition and vertilizers tank:
http://www.venividivissie.org/gallery/image.php?album_id=1134&image_id=28466
need more, just ask