I have grown DP for many years now IMO - The best most underrated strain on the planet!! flowering time id say 9 weeks max! as said in the post above mine DP can have a short as flowering time, I usually end up pulling mine around the 7 to 8 week mark. I have friends that grow dp and pull around the 6 week mark...
Make some bubble hash from your durban..... i swear its the funkiest hash you'll ever taste lol