Growers, meet your utopia: five acres of horticultural bliss, from the indoor greenhouse and bookstore to perennials and annuals galore — and did we mention the workshops and seminars? Then there’s the always impressive staff. Need advice on the vagaries of growing orchids, or a primer on fixing a drooping ficus? They have the answers. And for the gardener whose thumb has yet to turn green (or maybe never will), a flower shop on the premises sells arrangements that you can take all the credit for.