How to Grow Thalictrum
Thalictrum delavayi 'Album'
How to grow Thalictrum
I love Thalictrum. It is such an easy to grow, beautiful, romantic flower with many delicate fluffy flower heads which seem to just float on the breeze. It is one the top best and easiest plants to grow and gives a great height to the borders. Thalictrum, common name meadow rue, flowers in the summer and has the additional benefit of being long flowering with attractive seed heads as the flowers fade. It is herbaceous, which means it dies back over the autumn leaving bare earth in the winter, from which fresh new growth appears in the spring.
It has unusual fluffy flower heads, usually pink/purple with long lasting flowers. The image far left show Thalictrum aquilegiifolium which is commonly sold in garden centres. It has the RHS garden merit award and is fully hardy. The other images above are Thalictrum delavayi, also readily available on line and in garden centres, the middle image is T. Album a white variety and right a pink variety all of which have the RHS award . Thalictrum delavayi and aquilegiifolium both grow up to around a meter which makes them ideal for the back of a border. Generally, unless grown in an exposed position I have not found it necessary to stake Thalictrum which is a real bonus with such a tall plant. These are the most commonly grown and varieties offered for sale.
Thalictrum's preferred growing conditions are that the soil is on the moist side, although well drained. That said Thalictrum will grow reasonably well in most borders in terms of position and soil types, and tolerates partial shade. Although it is tall, I have never bothered to stake it and despite some gales and poor summer weather it has remained upright. One advantage of not staking Thalictrum is that in the wind the whole plant moves around with the breeze, and it seems not to mind floating around freely without being staked. If your garden is prone to blustery winds rather than stake Thalictrum, which spoils
its lovely ethereal shape, plant around it to give it protection and support, such as with Delphinium or a contrasting shrub. Thalictrum looks good with any of the delicate grasses such as Misacanthus sinensis 'Kleine Silberspinne' or Molinia Caerulea.
It creates a good effect to plant Thalictrum in a woodland or streamside setting, and streamside it combines well grasses such as Phalaris arundinacea var.Picta, common name Gardener's garter. This grass has a pink tinge to its foliage and looks good with the Thalictrum but beware the Phalaris can be vigorous.
Thalictrum also looks good in a border teamed up with Delphinium which makes a great planting combination, illustrated left. Thalictrum is colour coded green wheelbarrow, as it is really easy to grow with little maintenance, Delphinium are colour coded red, as they require more time and effort, but together they do make an outstanding planting combination. There are lots of other great summer flowering plants which combine well with Thalictrum, and ideas on summer planting combinations.
Thalictrum can be cut back after flowering or delayed until the late winter/early spring as the foliage and seed heads remain attractive. I tend to leave the stems and seed heads which are quite attractive and usually I am rewarded by seeing small birds perched on them. Thalictrum can self seed but not so much as to be invasive and is trouble free.
I know of no down side to growing Thalictrum and it is just so pretty. The image left is of a lovely white variety known as T. delavayi 'Splendide White ' which is fully hardy and tolerant of dappled shade, preferring soil which is on the damp side.
The easiest way to propagate Thalictrum is by division in the spring. Dig up an established clump and divide cutting through the clump and roots, and re plant separately. Water well and they will establish easily.