swords are usually most people 1st plants as there easy,low light and usually hard to kill
im about to set up a sword,java fern, anubias,moss tank. ive got 2 wpg and im sure they will do fine!
they will grow in low light condtions but need some kind of ferts to actually grow as said above.
swords in just eco will grow ok. root tabs will aid in ferts for the swords
i think of aquarim plants like outdoor plants. there the same really.
miracle grow fert your plants and they grow like crazy, dont and they barely get along.