I have two rosemary plants, one is over six months old and the other was bought from a shop about 4 weeks ago.
This is the older one I grew from seed. It was the only survivor of 5 seeds I planted roughly 6-7 months ago. It was also one of four pots partly damaged by Cane Toads and I have neglected it for roughly eight weeks now. Its leaves are very powdery, cracking and frail looking. One stem had lost all of its leaves which I pruned today. Since I started watering it the lower leaves seemed to have that nice dark green color return but now they too are starting to look bad.
I have the new plant in an upright planter that does get lots of water so I'll be moving it to its own pot. The planter gets sun for most of the morning but by midday it is in shade from the house eves. During the coming summer they will get a lot more sun. The pots on the ground get the same amount in the morning but they also get the afternoon sun until about 4:30. The reason for the extreme moisture you can see in the pot was I had something eat a lot of my herbs so I moved to a small green house. This kept everything very moist and a fungus/mould started in quite a few pots for the week they were in there. I had already asked about the fungus earlier, and didn't think that a greenhouse would cause it too. So they are now back outside to dry and air out. (less than a day outside and my kale had 5 leaves eaten)
An this is the entire herb garden early morning minus the trickle feed system that I normally have hooked up to the pots. The older rosemary plant is in the pot near the reddish pot, and the newer one is in the left hand side upright planter second bay from the top and on the right side of that pot. (there is a curry plant next to it in the middle)