Betty lsd

Week 5 of flower, betty is i think growing well she is turning yellow i dont know if this is ok or not, i cant see it being a nutrient deficiency, after veg flush she has had 2 full nutrients and a half dose, so 17.5 milligrams in total, she gets water every sunday and Wednesday about 3 litres, so anywere from 5 to 6 a week and she gets fed on sundays. She has lots of white hairs and crystals are plentyfull smells good and she is nice and sticky not to much of a smell yet, i would love to know if she is on track or if she needs anything extra like nutrients, heat, water, any advice would be great as i feel betty is to good to get damaged at this point in her cycle, she has about 4 weeks left of flower, but as i let her grow extra in veg she might need a couple of extra weeks to compensate for the extra height, let me know what you think and any advice would be great, cheers chris