chillies not flowering

So ive been growing my chillies under a shadecloth, they get plenty of sun 9am-4-5ish. been average temps of 30s. soil temp is at least 30deg C. 
 
the only ones the have started fruiting and flowering are the Jalapenos and Habeneros.
Other Chillies are: Carolina reapers, Brain Strain, Moruga Scorpion, Bhut Jolokia. the reapers are 50cms tall and still no sign. is this normal?  
 
also are the big leaves normal? i have this with most of my plants that arent flowering
 

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