I have these pesky little black and in my Gardenia tree its a Topiary... I recently had to move it and that's when the ants got in it .... it did have aphids and mealy bugs but i got them off ..I had to recently put some of that Diatomaceous Earth in the dirt and on the plant ..and I also had to spray a insecticide on it to kill most of the ants .. All of my bloom have fallen off :( it was full early this summer and still has maybe 1 or 2 blooms left.. I had to deadhead the old ones and in the bottom of the flowers had lots of ants, i guess because it has the sweet stuff in the flowers... Now my question is , are the ants cutting the blooms or is it because of the move,,? I will have to move it 1 more time and that's when i move.. Should i just prune it back and forget about this season or what ? Thank you Nikki
Gardenia are finicky plants so the answer is both have likely stressed the plant.
I've listed several articles to refresh you on the care requirements and information on how to get your plant back to health.