Sep 21, Sep 21, Prune off the lower branches at the base of Althea to create a tree-like growth pattern. Use the lopper to prune althea that has not been pruned for several years. Cut out the thick, old branches at or near ground level. This method to prune althea can be done once a year or every other year to help prevent the shrub from becoming top heavy.
Oct 11, Pruning althea. At the beginning of spring, towards February-March, it is time to prune your althea. Althea will bloom on new growth, so you can prune every year.
However, try to avoid pruning late in the season, since this would tend to reduce blooming. Remove all branches that grow inwards so that the shrub can filter light through the inside.
Cheap Bush Trimming in Danvers, Massachusetts. If you are looking for a bush trimmer you can count on Bush Trimming Now to quickly match you with Danvers bush trimmers close to you. Why You Should Use Our Service: Connect With bush trimmers Quickly. - Find Contractors in the Danvers Area. Poor Flowering on Rose of Sharon After Pruning. I planted an althea bush (Hibiscus syriacus) a year ago. It flowered great that year.
In fall I pruned 1923 Danvers MA back. It grew 2 feet but only bloomed on the tips of the branches. Prune althea bushes, also known as Rose of Sharon, in late spring. Prune young plants hard to encourage branching at the base.