so far i have been using one fert NPK:7-3-6 full stergnth along with the PK:13-14 in half strength.....from the following week i go into PK:13-14 full strength(that's 100-125ml/100lt of water)....for one watering every 3....two weeks are enough....then one week only water and then it's the harvest week......cross ur fingers and wish me luck!!!