Welcome to my website. This website handles the overflow from 'Growing Ornamental Plants'. Both sites show how I select and grow ornamental plants which can cope with extremely hot and dry conditions in summer, and I show how I use water saving methods to achieve this.............John Ashworth 26th December 2015.
Growing New Guinea Impatiens
Latest Update 11th January 2016.
New Guinea Impatiens.
The have uncomplicated pretty flowers which contrast beautifully with their waxy foliage and they love hot weather.
However, as they are native to equatorial New Guinea rain forests, they need to grow in moist soil protected from intense mid day sunshine.
I grow mine under an apricot tree where they get enough sun, but are protected from the worst excesses of Melbourne's hot dry summers.
I keep my New Guinea Impatiens well watered but not drenched, and I avoid watering the leaves.
They grow viable seeds if allowed and can also be propagated by soft tissue cuttings. Cuttings will reproduce the parent plant's physical characteristics more accurately than seed unless you can get hold of open pollinated plants.
I treat mine as annuals as they are frost tender and die back in our cool winters. In climates with warmer winters they can be grown as perennials.
Pot up to a larger sized pot as required and keep the plant protected from frost during winter.
Replant each Impatiens plant in the prepared bed after all danger of frost has passed during the following spring.
Apply a foliar spray of activated aerated compost tea every month when the edible plants are sprayed and remember to spray the plants in the propagation unit.
Remove and compost the spent plants when they stop flowering in Autumn.
Organic Pest Control.
It is about 15 years since I last grew New Guinea Impatiens and I don't remember them being vulnerable to any serious pests. When and if I have a problem, I will try to diagnose it and publish details of my response.
However sensible preventive measures like regularly spraying the plant with aerated compost tea will boost their natural defences by colonising the leaf surfaces with beneficial microbes.
These microbes defend plants against airborne pests and diseases.
proper soil preparation including regular applications of home made
compost boosts the community of beneficial
microbes and defends roots against plant pathogens.