There are two basic types of Tamarix - Spring flowering and late summer/autumn flowering.
We deal with the spring flowering Tamarix tentandra here, which requires different pruning for the other types.
When to Prune Tamarix tentandra. Also known as TamariskTamarix Tentandra Grown as a small tree.
The flowers and flowering stems are made in the growing season before actual flowering, so stems allowed to grow in late spring/summer 2008, will produce flowers in Spring 2009. If the stems are pruned late in the year, then they will not have enough time to grow into flowering branches for the next year. You will lose a year of flower!
Prune all of the flowered stems back hard - right back to the trunk or main branch - right after flowering has finished. The finished job will look like a stump.
No matter, it will soon start sending out long arching stems which will then flower in the following spring. This type of pruning will ensure that you have plenty of new growth, and not the rather sickly old wood as can be seen in the image above.
The timing for pruning Tamarix tentandra is important. Don't do it too late pruning your Tamarisk tentandra