It is a common misconception to believe that seeds in general need light to germinate : in reality very few seed species need light, some seeds even find light a hindrance and can only grow in darkness, while most species germinate either in darkness or light.
Hoya seeds don't need light to germinate and to grow to a certain stage but they don't seem to be affected by light either. The percentage of seeds that germinate in the darkness of a closed zip bag between layers of humid toilet papers is not lower than seeds directly planted in soil.
Both methods require the seeds to be selected from the pods ( the " empty " seeds must be discarded ) and sown right after harvest.
More on seeds and their darkness or light requirements :
On the picture the seeds of Hoya verticillata are showing out of the paper not because they were pulled by the light - they were in darkness 15 days and probably started to sprout a few days after being put in a postal box -. The condensation on the plastic bag may be a factor of their exit from the paper.
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