We are re-doing an area in front of the house and I am thinking of using large pots or planters to put in lavender, rosemary and some grasses. I also want a couple of small trees including a small palm tree. What are the best planters? I have some plastic ones but they fade. I've also had some terracotta ones which have been OK. I like the look of rectangular wooden ones but am worried they will rot over time. I also have an old metal one from Ikea which has been pretty good but is now starting to rust. It seems as though they all have their pluses and minuses.