This is my first season working in a greenhouse, I have a lot to learn, I have just repotted and planted annuals from plugs into quarts and some into hanging baskets. How often should they be trimmed, I know you need to do some to get them nice and full, also how often should they be fertilized. The plants are Petunias, Geraniums, Lantana, Cali’s, Impatient, Bacopa, the more common annuals.
Certified GKH Gardening Expert
It would be difficult to give a timetable because growth depends on a lot of factors. However, as the stems begin growing beyond the container, start pinching them back 1/2 an inch to an inch. As they get fuller, continue to pinch the growing tips so they will branch. You will get a feel for it, the more you do it, and how often.
If you use an all purpose time-release granular fertilizer like 10-10-10, you can fertilize once every two months.