PERENNIALS > genus Hypericum > PROBLEMS
IN THIS GUIDE
HYPERICUM GUIDES
Common ProblemsPruningVarieties
Hypericums are very dependable and in general trouble - free plants for UK gardens .
St John ’s Wort and other annuals , perennials and bush in this genus are generally rarely troubled by pest or disease .
In fact , they are said to repel certain plague species , and may really make good fellow traveler plants and assist other plants develop near by .
1) Creeping Rhizomes
The primary job with these plants is not actually a job for the industrial plant but rather a job for the gardener .
Once certain members of this genus are placed in your garden , they develop panoptic creeping rhizomeswhich may creep underground and conduce to plants pop up where you do not want them .
Once in place , these are plants that can be very difficult , if not inconceivable , to get rid of exclusively .
St John ’s Wort , the well - bed herbaceous plant , is often consider a smoke in gardens and it can ego - seed pronto – not always where you desire it .
It is very unmanageable to eradicate it permanently from your garden .
Even if you think it ’s all gone , semen can consist dormant in the soil seed savings bank for years , and germinate once disturbed .
If you want to take undesirable Hypericum , try using a specialised weedkiller .
2) Rust
The very things that can potentially make more vigorous genus Hypericum a problem for nurseryman , their doggedness and propensity to spread , also make these plants extremely resilient .
They are hardy , happy in a range of conditions , and seldom troubled by pests and disease trouble .
now and then , some genus Hypericum , such as Rose of Sharon , may be afflicted by rust , which is a fungal disease that induce a spotted yellow or bronze discolouration on the leaf .
However , this does not typically have a vast impingement on the industrial plant and moved foliage can simply be removed to prevent the trouble from spread .
“ Having form in gardens where cervid and barking deer hold everyday feasts , Hypericumis incredibly useful because it is deer - resistant and is one of the surprisingly few plant I have not know them to touch , ” say Peter Lickorish , a Horticultural Consultant .
“ During extension , grey mould ( Botrytis ) can be a trouble if there is inadequate airflow or too much moisture .
“ Cleanly pick or cut off the scathe and a few surrounding leaf , if possible , to decoct its gap . Sterilise any equipment used afterwards . ”
3) Frost Damage
While genus Hypericum are generallyhardy in the UK mood , highly frigid conditions , specially when combined with winds and Charles Percy Snow , can extend to frost hurt .
The leaves may have discoloration and turn dark-brown .
However , even larger areas of frost damage die - back will usually not be as big an egress as they come out , and novel growth should emerge when precondition amend .
“ The key is to be patient before pruning later in outflow , ” shares Peter .
“ The older growth can play as an insulating blanket to protect more fragile shoot underneath . ”
Of course , it is important to find the right genus Hypericum for your needs and to realise that this genus has a wide mountain range of dissimilar plants .
However , many of these will be great choices for a humiliated - maintenance and largely dogfight - free UK garden .
