I am moving my drumstick primroses from the borders because they are growing over the annuals. I have a spare bit of ground by the greenhouse.
They have increased in size and need dividing. Can anyone tell me when it is best to split them up, now or when I replant them in the borders? Also when is the best time to put them back, Autumn or Spring? I have only had them 2 years and left them where they are last year. Thanks for help and advice.
Have a look in here;
http://www.thegardenersalmanac.co.uk/Data/Primula.htm (http://www.thegardenersalmanac.co.uk/Data/Primula.htm)
They like moisture so it would be better to wait until the heatwave is over. I'd do it in autumn or early winter.