Yes, you can trim them back to about 3 inches in this shape "^".
Can I assume you mean Wisteria? If that is the case summer pruning is the proper way to control it and encourage flowering. Shorten back the shoots that grow from the main stems after flowering.
I would say summer, because in spring, the leaves are just starting to grow. In fall, the leaves change color and fall off. In winter there are no leaves. In summer the leaves have all grown back and are prospering.
Iris leaves should be trimmed back when they have brown tips. Cutting the flowering stalk to the rhizome will also discourage rot. The leaves usually don't need to be trimmed because they will carry on photosynthesis for next year's growth.
Plants need to lose leaves in the fall because the leaves are very dry. In the winter, plants already have all their leaves lost in the fall, but they can't grow back because it is too cold. In the spring, it gets warmer so leaves can grow back. In the summer, a few leaves die because they are too hot and too dry.
If you cut back the flowering stems of lupins after the flowers have faded you will get a secondary flowering. Any other cutting back should be to the ground in Spring when growth restarts.
You can ,but why would you? The right time to prune a Forsythia is immediately after flowering.
You can pretty much go as low as you wish. You should leave some leaves on the plant to allow it to obtain nourishment. Typically it will grow back fairly quickly. Most place that really cut back leave at least a foot standing.
No it's in the pile of leaves he jumped on before. Click the leaves and you have to blow away the leaves then click on his blanket and take it back to him where he is at the mailbox. -VG, glad I could help =P
In February or March, you need to cut the plant back to four to six inches high. Leave two or three leaves on a branch. You need this to cause new buds to grow. Then you need to keep watering it and give it some plant food every two weeks. You can bring it outside in the summer but bring it back in by September 15. To make it flower, it must be in complete darkness from 5 PM to 8 AM. It needs to be kept between 60 and 70 degrees. Too warm will delay flowering and too cold could kill the plant.
Unfortunately, summer classes can't always be avoided. Summer classes aren't so bad; you could have lots of fun! They tend to be more laid back than classes during the school year.
Using more air conditioning in the summer - apex
They will be back.