Answer: In my experience it is usually better to trim them back a bit to encourage them to branch at the base or lower on the plant. (You can root the trimmings like tip cuttings.) You may also find that they are root bound if they have been held too long. If this is the case you would want to untangle the roots and direct them outward, or root prune a bit to encourage the roots to grow outward into the soil. You should probably also work in an ample amount of organic matter (compost if possible) at planting time and also be sure to fertilize regularly. Unfortunately this type of early stress can limit their ability to perform in the garden, so I hope they grow for you.
Q&A Library Searching Tips