In this month the sun moves into Mesha rasi (Aries), and the new year begins according to many calanders.
Keshava Vrata starts; for one month one should control the senses, sleep on the earth, bath twice daily in a river, worship the Lord and give cloth, sugar, sesame, rice, and gold to the brahmanas. If one worships Madhsudana in this month one gains the benefits of one years worship.
While Keshava Vrata lasts one may hang a pot with a hole in it, fill it with water and drip water over Tulasi and a Shalagrama Shila.
This is especially done in the now hot northern hemisphere when water becomes a vital asset for the growth of Tulasi Devi. In the southern hemisphere be careful not to overwater as we come out of Summer and into Autumn.