i have a planted tank however im not a pro like some of the other people on here but i can tell you that your going to need a strong light. a likght with 3 watts pergallon i think is a dependable amount.i find that 6700k bubls work good i have all ym tanks run off of powercompacts but im only 17 and cant afford stronger and better ones. also you will need a subtrate bed which will have nutrients alredy in it. i know that seachem makes a subtrate for planted tank and also other brands do the same. Many people use root tabs which are fertilizer sticks thast u put in the sandbed so the roots can absorbe nutrients. Amazon sword plants are heavey root feeders which will thrive off these fertilizer sticks. other fertalizers are liquids tha u pour into the tank. some keepers have c02 systems which pump co2 which is a need for plants into the water. there are do it your self ways to creat one if you dont feel liek spending hundreds of bucks on a co2 tank. this do it yourself ideas are good because it uses yeast, warm water and sugar to make Co2. there is one problem with planted tanks, and that is algea. if you do not keep your water leves right algea will grow and u will dislike the look of your tank and your plants will die due to insuficient nutrients.
i dont know what else there is to say hopefully a profesonal reads ur question and helps you because im only 17. but i hope what i have said helps and if u need any help just ask i may be able to answer them

Here's my suggestion for a beautiful planted tank at low cost. I had great results with my 60 gal tank with 4 4ft 40 watt shop flourescents(8-10 hrs per day) growing anacharis, java fern, java moss, and amason sword (that's about 1.6 watts per gal). The sword probably wanted more light, but it still stayed alive and grew. The anacharis, which comes in small(forground) and large(background and attatched to wood) sizes, and does fine with relatively low light, but I wouldn't use any less than the lighting I was using. My tank was a low cost alternative to the expensive with high output lights and or the CO2, I had a beautifull, plant filled, tank and I actually had to thin out my plants due to overcrowding as they grew, and with the proper biological cycling of fish waste I never needed any aditional fertilizer. Actually, fertilizer just grew algae when I tried to use it. Use a subtrate that is recommended for plants, and like I said, proper biological filtration can supply all the nutrients nessecary for thriving plants( I suggest using the largest Fluval type canister filter you can find; they're quiet, allow the tank to be close to the wall, and are easy to clean, and an oversized one allows you to allow more time between cleanings) Use an undergravel filter with one or two powerheads and just tear out the roots if they clog the riser tubes. Obviously, if you want to spend lots and lots of $, and you want to grow grasses and plants requiring strong light, you can go with the above replies. One note: even a 40 watt flourescent bulb should be replaced after 6-8 months due to the decline in it's quality of light over time. Here's the BREAKDOWN LIST: A 4 bulb 4ft shoplight w plant bulbs, 2 strong powerheads, 3-4 inches plant substaight, an undergravel filter, at least one peice of wood (the sinking kind for aquariums), some large anacharis for background ( roots can grow down over wood), a amazon sword for background, small (petite) anacharis for mid to forground, and java moss and java fern (both should be tied to the wood so they can have a chance to grow onto it).XXXXXX Everything but the Fluval should cost less than $200, and I would go with a 100-200 gal tank capacity canister filter ($100-$150) with different size mesh sponges on the bottom level, a lot of medium for benneficial bacteria to grow on on another, and another level for activated charcoal. When you need to do a 30% water change, use a siphon type gravel cleaner and clean all the muck out of the gravel with that. Don't worry about disturbing the roots too much. Just push the roots back in and let the water clear. If something happens and the benneficial bacteria die due to fish wast overload or use of some medications, reboot the cycle with bacteria you can buy for that purpose and almost starve your fish so the cycle can reestablish. I wanted to groe grasses and some plants which demand lots of light, so I bought a 4 ft 65x4 watt light, and that was $200 plus by itself, and I'll need to change all 4 bulbs at about $45 each every 6-8 months, and they can get hot too, and if you don't have a proper fan they will heat up the tank and can kill your fish in hours. I'd start the way I suggested, and if you want to start spending mega bucks and fighting algae infestations by getting high output lights and maybe CO2 you can just do that later. Like I said, I had a gorgious tank with cheap shoplights and had more plants than I knew what to do with in no time. Good luck! Peter