For phenolic compounds. Extract your plant material in 70%methanol and dry it. You will definitely get a lot of spots on TLC. Load your extract into silica 60-120 and purify it. You can also use resins, XADs also. You can also load into column containing C-18 packing material and elute the column with 5%methanol-20%methanol to get purified phenolics. Try it.