Jun 22, Since these durable shrubs need little care in the way of soil and nutrients, forsythia pruning is a chore that can easily be done annually. With diligent trimming, forsythia can be kept from the overgrown sprawl that is a common complaint.
May 22, Avoid pruning your forsythia when the plant is years old.
Young forsythias need little to no pruning. Only when they mature should you prune them once a year%. Jan 08, If you do decide to trim your forsythia into hedges, you’ll need to prune several times a year instead of just once in the spring. Drastic Pruning Okay, I get it. Jan 03, This involves cutting between ¼ and 1/3 of the oldest stems to the ground; do this every year.
Focus on stems that are damaged, trailing on the ground, crossing, or look out of place. Be sure to always take a few of the larger stems out of the center of the shrub. May 03, Forsythia blooms on old wood, so pruning too late will cut off the flower buds that formed earlier in the year.
Annual pruning is a good idea to keep the shrub manageable in size. All good intentions aside, sometimes this just doesn’t happen and you end up with a huge shrub Estimated Reading Time: 11 mins. Jul 10, I prune my forsythia every year. As long you wait until it’s finished flowering in the spring as you did and don’t cut back again after July 4th, in my area which is zone 5, you’re just fine.
Prune. Dec 31, Another caveat is that if your forsythia is really old or otherwise unhealthy, it may not respond to hard pruning rejuvenation.
It may die. So there is a bit of risk with forsythia rejuvenation pruning. You can rejuvenate your forsythia every three to five years. Forsythia plants are happy plants.