If you have lights on a timer, you can easily neglect anubias nana and java moss that long. Neither one takes very well to planting the rhizome so they must be planted very high in the substrate. The usual practice is to tie them to something with fishing line and then let them reach roots down to the substrate on their own. I also have good success using anacharis as a floating plant. As long as someone is feeding the fish and doing occasional water changes, these plants will thrive on neglect. None of them need much light so be careful you don't cause an algae problem with too much light or lights on too long.

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Fishless cycling