It has been 2 weeks since the nute burn (been flus...

Flowering usually takes 9 weeks, well except sativas, which can take a couple more weeks. That means that you still have 3 weeks left. Just the weeks where the buds fatten up. Now 10 liters of soil only lasts so much (usually 7 to 8 weeks). You gave it a burn and now you are afraid to do so again, and so you are starving the plant. I would start feeding some bloom nutes (or a PK booster). An EC meter would really help in avoiding future burns. I would give a small feed of 1.2 EC (600 PPM) and give 5 to 7 days to see how it reacts (usually by this point I'm feeding 1.8 to 2.0 EC (900 to 1000 PPM). I can't stress enough the importance of a pH meter (you don't seem to be using one) and an EC/PPM meter, it really helps in dialing the feedings. It still have some time to fatten up ans as long as no new damage appears you are fine.