ehm Dinyar; the plants I listed are dead easy to keep.....
I specifically DIDN'T list any Swortplants (they're more demanding when it comes to nutrients and light) or any fine leafed plants etc. If you want difficult ones, try Potmogeton or so....
To keep easy plants, just do this:
-light: 1-2 watts per square decimeter floorspace of the tank. (this is 10cm x 10 cm, for you inch people). keep this light on for 12-14 hours a day. Kind of lights: a mix of "warm white" or "daylight" bulbs and those pinky/purple lights used for planted tanks, works really well. (here that brand is called "Gro-Lux", you might have it there as well)
-substrate: riversand, about 1,5" to 2" will do fine.
-no clay, fertilizer, peat etc is needed.
-water: anything between pH 6,5-8; T 20-30'C; DH 5-15 will do fine.
I may be "grandfather in plantkeeping" (wich I ain't, you should know the amount of plants in and out of tanks I wasted; it's entirely possible to re-furbish a small Indonesian Island with that amount...), but the species I listed do NOT require special care; if your tank is running OK, the waterchanges are what they're supposed to be (at least 25% every 2 weeks, or more), the substrate is OK, and the bulbs aren't 10 years old, they should grow.
A few more tips for live plants:
#1: once you buy plants, treat them like you treat fish! wich means, NO sudden temperature changes!! A lot of people for example, wash new bought plants in a cold stream under the faucet.....days or weeks later those plants get slimey and die....
It takes plants longer to die than fish, but they die just as fast. Imagine "washing" a new Syno, with cold water before releasing it
If you want to wash your plants, use TANKTEMPERATURE water. And letting the plastic bag with new plants float in the tank for 15 minutes really helps them a LOT.
#2: cut off most of the roots, leave less than an inch, except for Crinum, Javafern and Lotus. Those roots will be crushed anyway, when putting the plant in the sand. In reality; the plant starts hisnew life standing right on top of rotting matter. Many plants then die. Believe me, a plant that was healthy when bought, will make new roots!
Anubias can easily be wedged between rocks or in bogwood. First cut off most of the roots -NOT ALL!- with a scissor; leaving 0,5" intact. On these stubs, new roots will grow, attaching the plant to its' new substrate. NEVER put Anubias IN the substrate! Javafern can be used the same, but rootcutting isn't necessary.
With Lotus, one often buys just a brown bulb. Make sure this bulb is both hard, and heavy. A healthy Lotusbulb sinks! And it NEVER smells. If it floats and smells, don't buy it.
Crypto's are often sold as a "bush" in a small plastic pot or netlike thingy. Remove this, and pull each plant loose from its' neighbour. Cut off the roots till about 1". Plant them separately, at least 5 cm between each plant. Crypto's often 'slime up' when added in a new tank, BUT stay out of the sand!! they will grow back from their "rhizome".
#3: Remove dented and crushed leaves from any plant when planting them. Only Javaferns, OakleafFerns and Anubias don't mind a few rotting leaves on them.
vallisneria's are sensitive to footrot, when new; these too need a 'haircut' when planted. Once established they're fairly hardy. The corkscrew variety is the most difficult; the Giant Val is the most easy to keep. Plant Valli's like Crypto's! One by one.
#4: Most easy to keep in any tank, and I've forgotten them before, are FLOATING plants. The easiest is Duckweed (Lemna minor) might be a bit unseemingly, but it's hardy, eats nitrates by the gallon, and gives a shady cover to catfishes too. This one should be available everywhere.
Another floater is Floating WaterLettuce (Pistia stratoides). This one almost always 'dwarfs' in a tropical tank, but that doesn't keep it from being a plague. Many fry hides in it's roots; it's a useful plant. The same goes for Ceratopteris thalictroides and C cornuta; the Floating Oakleaf Ferns. A bit fragile; but every broken leaf grows into new baby ferns. Especially bubblenest builders love this one (Hoplo's). Floating Moss (Riccia fluitans) is another easy one, although it can get infested with algae. It needs ample light and clean water.
Sid