Offering fragmented leaves to Lord Shiva would not make him pleased and would not get you auspicious results. So, make sure the leaves that you are offering to Lord Shiva are fragrance-free.
While offering bel patra leaves to Lord Shiva, always keep in mind that the smooth side of the bel patra leaves should touch the surface of Lord Shiva.
As per the significance of bel patra chanting the “Om Namah Shivaya” mantra or any other hymn that resonates with you can help create a powerful connection with Lord Shiva.
Plucking the leaves of bel patra for pooja on the day of Chaturthi, Ashtami, Navami and Amavasya is not considered to be auspicious, and one should not offer the leaves to Lord Shiva that are plucked on these days.
The Bel Patra leaves you to offer Lord Shiva should be fresh and clean. Make sure to pluck them from the tree on the day of the offering.
Usually, three, five or eleven leaves are generally offered, but you can offer any odd number of leaves you feel comfortable with.