I'm not exactly sure what kind of maple you are talking about but I did read (in a gardening book) that a Japanese Maple seed must be planted "immediately upon collecting" because the seeds do not store well. The book did not give any specifics on what to do for planting; however, I've had a few oaks and pecans sprout in my houseplant pots before when I moved them outdoors for the summer. The squirrels would "store" the nuts or acorns under the soil and by the time I would bring them in there would be seedlings growing... Wish I could be more help!

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