No, not hard at all. Some people think they are hard are to grow, because when they add them to their tank, they melt. This only (usually) happens for two reasons, 1( If a liquid fertilizer is added that contains gluteraldehyde, and 2( If the plant was originally reared in cold water, and is introduced to warm water.
The most common liquid fertilizer that contains gluteraldehyde, is Excell.
Root tabs are the best. (I personally don’t use them. They grow like crazy in my tank, and I don’t use any fertilizers/root tabs. If you added fertilizers/root tabs, they would go insane)
It’s a great background plant, and really helps fill in the tank.