Answer: Some of the quickest seeds to germinate are radish. They won't need light to germinate, so you won't have to invest in a gro-light for the seeds to germinate, but if you plan to grow them to maturity, you will need a source of artificial light. If you just want to chart the germination rate, you can sow the seeds in pots or trays and put them in a warm area. If you want to record the growth rate, you'll need to put the seedlings in a bright windowsill, or put them under a source of artificial light.
Hope this answers your question!
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