After reaching Siddhasrama,
http://freeglobaluniversity.blogspot.com/search/label/Sid
Radha took a bath and adorned herself in new clothes. Then she went to the beautiful mandapa which was established for Ganesha worship. Radha offered white flowers to the Lord and adored Him with utmost devotion. She also offered Durva grass or Bermuda grass, holy water, lamp, incense sticks, fragrant sandalwood paste, five clothes and many other presents to Ganesha. Radha also presented a sacred cow as charity. Afterwards she chanted the Ganesha mantra for one thousand times and also performed all other rituals related with Ganesha worship.
http://www.backtogodhead.in/when-sri-radha-worshiped-ganesa/
https://www.youtube.com/results?search_query=ganesha+radha+krit
Source
http://018g.blogspot.com/search/label/BrahmaVaivartaPurana
