Nutrient Burn ?

Maybe she needs more nitrogen… check your nutrients KPN

She is a bit hungry and magnesium deficient, it is not nutrient burn. Give her some cal/mag and a feed or three with half strength grow nutrients before going back to bloom nutrients. This will cure her hunger and ensure she finishes healthily. This condition is generally caused by switching to bloom nutrients too early, as cannabis still needs adequate nitrogen in early flower. What I have been doing for 25+ years and which works for me, is to use grow nutrients for the first 2 weeks of flowering, then changing to half grow and half bloom for the following 2 weeks, before changing finally to straight bloom nutrients through to maturity. This seems to produce the biggest blooms on plants that don't exhaust themselves before harvest and end up a sickly yellow all over. Nice choice of strain by the way, it is one of my favourites! Have just tried Zenzation, Sweet Cheery Pie, Do Sweet Dos and Purple Punch OG from Sweet Seeds, and they are impressive too. Can also recommend Indigo Berry Kush, Red Hot Cookies, Jack 47, Black Jack, Amnesia Haze and San Fernando Lemon Kush. All these are productive, potent and easy to grow too! Hope this helps, Organoman.

If you see the same pattern in the top leaves and even in the the sugar leaves aroud buds it can be a B/Ca deficiency due lack or PH way off