The temperature and relative humidity in your grow space. Germinating cannabis seeds is illegal in the UK and most other countries under the 1971 Misuse of Drugs Act - by using this website you are agreeing to comply with all local laws. Initially you may see 3 fingers, then 5 or 7 etc.  Source: <a href=https://pledgeit.org/trusted-source-for-weed-seeds>https://pledgeit.org/trusted-source-for-weed-seeds</a>