Best thing to do for spent plants
I have a bunch of things that come back year after year, but I cant remember if I have pulled them up or just left them. Right now one of my main beds is looking kinda shabby and dead.
I have Huge zinnias, vinca that comes back stronger and stronger each year. I have some crinium that got zapped by a recent frost, but only some leaves have died from that. I also have marigolds that have grown huge and half the plants are dead looking with the rest full of flowers and looking fine. I know there are probably other things out there, but I"m not thinking of them at this moment.
So my question is would it be better to pull them all up and/or cut back dead leaves etc so as to clean up the area? Will any of these (aside from the criniums, of course I wont pull them up) be discouraged from returning? or are they all just reseeding on their own?