Long Weekend Worries

Hey guys so i've got a plant thats about a week and half old and i need to leave it for 3 days over the long weekend and I'm wondering what i should do to keep it alive right now im just thinking of dumping it with water and hope for the best but if any of you have experience with this or a thought out plan that'd help out greatly. oh and its in a 1.5' x 1.5' x 2' box
 
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