Will an extra hour of dark hurt?

I keep my plants dark between 8am-8pm but i just found out i gotta be to work at 7am. I dont have a decent timer yet so ive been turning them on/off manually. How precise do you have to be? And will an extra hour hurt?
Thanks.

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11/13 will only reduce your yield slightly (1/12th), it won't hermie the plants so long as you're consistent.

Invest $17 in a timer at Amazon.


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Buy a cheap timer
No amount of effort less than this will keep your plants on schedule
Things always come up car troubles ...

Hi there.

Just reading this. Can’t you change to 7am to 7pm would be easier. But you should invest in a timer there well cheap couple of English pounds.

Peace and love is the way forward