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As a result of being stuffed in a cupboard for nearly 3 days without proper ventilation some of the leaves on nearly all of the plants have developed rusty looking leaves. I am only a week away from crop is this something to worry about should I just ride it out or take action? 
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Woke up this morning and she’s grown a bit from yesterday. 4cm tall now. HLG 135 was dimmed (to a level that was comfortable to look at, I have no way of measuring output right now) and is 26” away. I know it’s early but I have no experience! 
Found this on one leaf. I was gone for 3 days. Not sure what...... 
