(DS smiles cuz this grower is paying attention)
good looking friend, you've spotted an early sign of K deficiency; singed tips. i bet a lot of leaves have it. you just need to feed with some extra K, mj loves the K and most grows show signs of a slight K deficiency, if you leave it alone your plant will be fine, but if you add some extra K then your plant will grow a lot faster!
miracle grow bloom boost npk = 15-30-15 on the majority of commercial nutes the full strength dose is 1tbsp per gallon, but thats not what you want. you want to use something thats as close to 10-10-10 as possible because its balanced. even better is to use a npk ratio that leans toward K. K regulates water(essential for nutrient uptake) and controls fruit size, density and taste!
to use your bloom food to its max potential, use 2/3 strength(2/3 of a tbsp is 2tsp) that will give you an npk of 10-20-10, use it every other watering.
i have a suggestion on nutes, go buy some $5 Shultz Rose food 18-24-24 and feed 1.5tsp per gallon every other watering(9-12-12 very good). its the best npk ratio that you can find at a general store. you will notice faster growth with this npk ratio, you will see at least 1 new set of fan leaves per day.