the elite gardening challenge takes forever. I took almost the whole time to complete it. it's doable, but it takes forever and isn't really worth the time anyway.
There should be enough each time, some times there would only be exactly 25 so idk, trees can obscure your view of where they are located too.
Usually when this happens, I miss huge chunks of areas with the flowers and when I go back to look it's too late to drop them on the plot, but maybe you did something like that by accident too.
You should always have enough flowers. This is one of my "for fun" challenges where my goal isn't necessarily to earn medals. I always manage to fill the flowerbed, with about 15 seconds left.
The elite kills me, You need a full 16 on the first round and then only 9 to finish, so I usually go far out for the smaller number first then right around the garden plot for the final round...that one irritates me. The elite item matching is hard too but I love that one.