Recent seeds from Nirvana have not done well

Of my last 20 feminized Northern Lights, only half have made it to seedlings. I have grown this strain for a long time and used to get 90% or better regularly. Anyone else experienced this? Anyone know of another good NL strain?

Also, I grew AK48 for the first time and only got 2 of 5. That's too bad because I like the way it grew, not too bushy but good tops. I'd buy it again if I thought I could get more viable seeds.

I recently did a pack of nl regs from nirvana,5 would not sprout,and 4 males,one female my friend got in the seed I gave away.Maybe try atomic nl next time its pretty good smoke.