Members from the recycling and compost team returned a number of times to collect the wilting flowers.
Seeing the immense symbol these flowers represented, the council team came up with a quiet plan.
They removed all of the cards and messages and returned them to the Centre.
They then removed the paper and put the flowers in an isolated spot in the council's composting area where they slowly turned into compost.
The team then built some planter boxes and used the compost to plant daylilies.
Yesterday council representatives handed these over to the Islamic Centre.
Chief infrastructure officer Tom Williams said the attacks left a lasting impact on our city as well.
"Our Muslim community is so important to our city and we witnessed that in the days following the attack.
"This is just a small gesture to say to this community they are so loved, and we hope every time they walk past those planters they realise Palmerston North cares."
Councillor Zulfiqar Butt accepted the flowers on behalf of the Muslim community and thanked the Palmerston North community for their love and support this year.