You can go to agriculture supply shops, the ones who supply vegetable farmers, over there you will find mixes for all veggies. you need something with not very high N and higher PK, like tomato mixes. make sure they dont give you high N ferts for flowering, they will show you 100 types of high N just say no. You do not want flower ferts, those are not intended for fruiting plants. you can start with that if you absolutely don't have access to international marijuana specialized brands