Too Late To Put Clones Out In Southern Ontario?

alright so my buddies moving at the end of this weak and hes got a buncha clones left over that hes giving me i kno we got till late september but is it pointless to put them out? or should i juss try anyway i already got plants started from may but theese are a different strain? any suggestions

you can still but them out. veg growth won't be much, but they should flower just fine.