Calif_Sue said:It looks like too much moisture and not enough sun. You can do hard pruning, cut back by perhaps half. You could try rooting the tips, stripping off the needles on the lower branches.
It would do better in the ground. It does need full sun but sun on a black pot could also cook the roots.
I never water rosemary so it only gets watered when it rains in the winter months.
ctcarol said:Rosemary needs full sun, and fast draining soil. Once established, it is very draught tolerant.
Calif_Sue said:Cutting the plant in half and then taking the healthiest cuttings/tips and rooting them.
I have lost rosemary planted in too heavy clay soil, too much rain and the roots suffocated/rotted and the entire plant died.