Tina,
Problems with ants, I have many. Because I use sand-rich earth in the seedlings, like the ants nest on. When the flowers are indeed also, but here I do not see any danger. When I hover flies and beetles are much worse pests. Ants build their buildings often go where food is. Therefore, I had asked infested flower pots into the water. So I could only find out that the pot is infested.
Here the moving queen!
When all the ants were up I had sprayed with hard chemistry and then again with clear water - protecting the plant.
So they killed one seedling close to the root .... there is lot of sugar in the hole plant!
There is also a good home remedy for ants - baking soda (sodium bicarbonate). This is only in dry weather. Because the powder reacts to moisture and acid. This is also the mechanism.
You can mix it with powdered sugar and sprinkle on the ant-street and -holes baking soda. The ants eat that and since baking soda reacts with formic acid. The CO2 escapes into the ants. The ants then explode. Some ants then bring the mixture to the queen to feed it. If that works, you've won.
here is an example of the reaction
http://en.wikipedia.org/wiki/B...
han
