can i flush soil ? how can i flush soil ? and why should i flush to soil ? what does flushing do ? i am very newbie. i did a seacrh and i learned these.but i am not sure if these are correct: 1)when should i flush,and why? do i have to flush one time in every 2-3 weeks ? 2)to flush,i am need to purely water that 2 X normal watering amount without any nutrienrs,is it true ? 3)or should i water three times of the pot size .if i use 15 litre pot,should i give the plants 45 litre water ? which is true ? 3)after flushing,do i have to give nutrients ?or should i wait to give nutrients 1 weeks or 10 days after flushing ? 4)for example, if i never flushed,what would my plants happen ?