Q.Why have my freesias changed color?
I have freesias planted in a large trough. They started out as all colors and have now changed to just the one color. Can you please tell me why? They are now red with yellow throats and otherwise look and smell really good.

The article below will give you some reasons why flowers can change color. Some reasons include age, soil acidity, stress from transplant, and too much exposure to sun/heat.
https://www.gardeningknowhow.com/plant-problems/environmental/fixing-color-faded-flowers.htm
For more information on growing freesias, please visit the following link:
https://www.gardeningknowhow.com/ornamental/bulbs/freesia/planting-freesia-corms.htm