Hi and welcome to the guild. I'm not entirely sure what you mean by "plant". Also while Coreldraw is probably a quite nice program (I haven't used it for 15 years so i can't help you there) it's kinda tricky making maps with CorelDraw simply because there are very few maps made mainly with Illustrator or CorelDraw. I have used Illustrator for a recent map (see "The Secret Den") and I know Sapiento have made a recent town map with Illustrator).
If you wanna try to stick to CorelDraw you might look into maps from Harn - I think there are some sets of symbols (doors, chests, chairs etc) to download (on Cartographers Guild?).