This has been ongoing since I planted them 6 months ago. Some are doing ok, some look like this:
13 March 2015 07:59 AM
This type of damage looks most consistent with over or under watering. Check your watering routine, if you are watering more than 3 times a week try cutting back to twice a week, conversely if it is in a hot area and it doesn't get watered regularly try giving it some more water.