Seed mother plants require slightly higher nitrogen & potassium, while needing slightly less phosphorus. If these nutrient levels look familiar it’s because they’re pretty similar to what a vegetative plant needs. You do however want to be careful not to give it too much nutrients, because it can stress the plant out and slow the maturation rate of the seeds.
For anybody interested in sources regarding this information, the best place to look is for the nutrient requirements needed for seed-based hemp. There are many good sources of information from all over the world dating back over 100 years.
One final nutrient that should be examined, because it is often deficient, is boron, which can be easily obtained from a very small amount of borax. Cannabis, regardless of what it’s being grown for, requires slightly more boron than most other plants.