Thanks Odif, the plant was doing well till the new growth that have flower buds. Thrips definitely no, I check it physically every now and then, if doubtful I will take photos of it at high resolution and enlarge it 200 times to inspect them. Melody you have a good point there, thank you. The potting soil I use is from my bed on the ground and is usually planted with leafy veggies and only fertilised with compost. After each harvest the bed is left to its own devices where weeds will grow for about 2 months or so, sometimes less. When preparing the bed for replanting, I'll dump the old earth from the pots in and fill the pots with fresh earth from the bed. The only chemical fertiliser I am using is Epsom salt and is only for the chili. The amount of the magnesium I add in is about 1/2 a teaspoon each time ... err is it too much? I do this only when the plant start to flower, sorry I did not mention this earlier, for the prevention of blossom end rot. Today I decided to remove some of the leaves to have better ventilation and less chances of bugs attack. Still hoping that the natural blood and bone meal powder will help.