I planted out my Everlasting Sweet Pea earlier this year. At that time I had very little in my new garden. My Verbena was very small then. Since then I have spotted these sweet pea in other gardens and they seem to be very bushy and strong. I am afraid for my Verbena which gives me great joy and even in the bad summer that we’ve had has attracted lovely butterflies. Can I move my sweet pea or when should I do that?