First time grower using a 1000w mh and 5gal rounds. Now the mango and ww have been veg for 5 wks Mango looks awesome. Bout 9" another 7" all 3 widows about 4-5". Is 4-5" good after 2nd day in beginning of 5th week. I want to start flowering now so that the mango doesnt get to tall but I don't...