United Kingdom 
I used to be able to grow lavender in my garden but in the last couple of years, every plant I have planted has died within weeks of planting. The gardens at either side of mine are growing it so I can't imagine its the soil but I cant think of anything else. Any advice would be very welcome thanks
26 May, 2016
Answers
are you planting them in the same soil as the ones that died? if yes then don't. plant them in a different place or dig out the soil and replace it first.
27 May, 2016
Yep, it sounds like some kind of root rot fungus. At the very least, let the soil rest from lavender for the next several years.
27 May, 2016
Previous question
Perhaps you are over watering them after you set them in. After planting, slightly moisten the soil and no more than that. See if that helps.
26 May, 2016