Medinilla magnifica plant in flower in a large pot well above
the ground
Medinilla magnifica the most spectacular and most widely grown species
of Medinilla, is as most Medinilla species a perennial epiphytic plant
belonging to the plant family Melastomataceae the same family as the
beautiful and well know Tibouchina tree.
Distribution
Medinilla magnifica is a native to the Philippines where it is found
growing in the provinces of Luzon, Mindanao, Mindoro, Negros and Panay.
Habitat
Medinilla magnifica is found growing in high elevation mountain cloud
forests at elevations between 300 metres (980 ft) and 1400 metres (4593
ft) above sea level.
Description
Medinilla magnifica grows up to 3 m tall, with opposite, firm, leathery
leaves, which grow to 20–30 cm long in an ovate shape with a short
point. The flowers grow in panicles up to 50 cm long, with ovid pink
bracts. The individual flowers are up to 25 mm in size, and are pink,
red or violet. The fruits are violet, fleshy berries, about 1 cm in
diameter.
Landscape Uses
Medinilla magnifica plants are extensively grown as houseplants and
greenhouse specimens in Europe. They are also well known as
garden plants in areas with the correct climatic conditions such as in
Durban, South Africa.
How to Grow Medinilla
magnifica
Medinilla magnifica grows naturally as an epiphyte high up in large
trees in relatively cool mountain cloud forest which dictates certain
cultural requirements when it comes to successfully growing this
magnificent ornamental plant.
Growing Medinilla magnifica is very easy and rewarding as long as one
understands the growing conditions required by the plants.
A large well grown Medinilla magnifica plant
I have found that growing Medinilla magnifica successfully outdoors
that they need to be grown in hanging baskets or pots raised well off
of the ground for a number of reasons that I will go into here. First
and foremost, Medinilla plants are very susceptible to attack by
root-knot nematodes that will cause so much damage to the root system
that will lead to the point where the plant cannot properly absorb
water and nutrients and will eventually die. This is probably the main
reason why most growers have such limited success with these
magnificent plants when they try to grow them in soil in the
garden as regular garden plants. Secondly the flowers are produced on
long pendulous flower stems that hand well down below the plants and if
grown at or near to ground level the flowers land up lying on the
ground where they cannot be seen and soon start to rot. Hanging the
plants up in a basket or placing the pot they are grown in well above
the ground allows the spectacular flowers to hang down below the plants
and to be able to fully develop at the same time it keeps the plants
away from easy attack by soil dwelling root knot nematodes.
As epiphytes Medinilla magnifica plants need to be grown in an
open free draining growing medium much the same as epiphytic orchids
require. In the past I have grown them in various mixtures of course
orchid bark, charcoal, coconut fiber chips and coarse sieved leaf mould
with great success. In fact they do not appear to be too fussy on the
mixture as long as it is free draining and holds sufficient water to
keep it moist between watering. The pots or baskets that they are grown
in must have adequately large hole to allow for good drainage as well
as for good gas exchange to the roots to ensure good and healthy growth
of the roots without which one cannot have a healthy plant.
Wind
Medinilla magnifica plants do not tolerate wind because they grow
naturally in areas that do not normally have strong winds and if
subjected to windy conditions especially when new leaves are growing
the leaves will become badly damaged, so make sure your plant is grown
in an areas that is very well protected from the wind. On hot windy
days if new leaves are developing it may be necessary to water more
than once a day or to employ an automatic misting system that can mist
them at predetermined intervals during such weather conditions. This
will also keep your plants cool during the hottest part of the day in
summer.
Light
Medinilla magnifica plants grow best in dappled shade, direct sun will
scorch the leaves or cause leaf drop. Consider the Medinilla's natural
habitat where as it grows nestled in the branches of large forest trees
where it receives dappled sunlight, to grow them well they require
similar conditions in the home garden.
Watering and misting
Although Medinilla magnifica plants are generally known as being
tropical plants it is therefore expected that they enjoy hot and humid
conditions. This is not true they are plants from the tropics but they
grow as epiphytes in tropical cloud forests at relatively high
altitudes where the temperatures can be rather cool seldom exceeding 25
degrees Celsius and therefore do not particularly like very hot humid
weather. For instance, at the Singapore Botanical Gardens the various
Medinilla species are grown in a refrigerated glass house. Medinilla
plants can be grown very successfully in the hot humid coastal
districts of KwaZulu Natal but will need a little bit of above average
care and moisture to do well. A little inland at a height of 1500 feet
above sea level presents ideal growing conditions for these plants.
Just bear in mind that they are epiphytes from cool moist forests and
that the growing medium should be kept consistently moist but not soggy
at all times during the growing season. Watering will need to be
reduced during the winter months.
Fertilizer
As an epiphyte Medinilla magnifica is a light feeder however frequent
feeding with a variety of liquid fertilizers and strengths of about one
quarter of the recommended application rate is essential for good
growth and flowering.
Pests and Diseases
As already mentioned epiphytic Medinilla magnifica plants are highly
susceptible to soil born root knot nematodes which need to be avoided
at all costs. These nematodes are however easy to control with a number
if nematicides that are both extremely toxic and very difficult to
obtain by the home gardener, such as the highly toxic and highly
dangerous Temik® belonging to the family of carbamate
insecticides the active ingredient being Aldicarb also known as two
step because it is said that if ingested one will only make two steps.
Another highly effective yet equally toxic and dangerous nematicide is
Curator® containing the active ingredient Carbofuran. There is also
another nematicide FOXAMYL which I have not tried that is available in
South Africa, but the sale of which is probably as with the other two
remedies only available to farmers and registered pest control
operators with the appropriate endorsement. This being the case
it is most important to ensure that plants purchased have not been left
standing in contact with the soil at sales nurseries because they could
very well be infected and to also ensure that plants free of this pest
do not become infested due to negligence. If anyone reading this
article does discover an infestation of root knot nematodes, I have
both the appropriate PCO certification with endorsement as well
as appropriate nematicides to deal with the infestation.
The only other pests I have found attacking Medinilla magnifica plants
are waxy scale insects that attach themselves to the mid veins of
the leaves and occasionally red spider mites in particular if
they are grown indoors that are both easily dealt with by applying a
little Efekto Insecticide Granules.
Potting and Repotting
Please note that Medinilla magnifica plants can grow to a considerable
size in a rather small pot if watered daily. This having been said
please do not plant your Medinilla magnifica plant in a pot that is too
large as this will not lead to your Medinilla magnifica growing more
quickly but will only lead to rapid deterioration of the growing medium
and poor growth or death to the roots and eventually to your plant.
Only repot into a larger pot when the plant has achieved a considerable
size and then only into a pot that is one or two sizes bigger than the
pot it came out of.
Pruning Medinilla magnifica
Potted Medinilla magnifica plants need regular light pruning to
keep shape and to encourage new vigorous growth and production of large
numbers of flowers. This must be done immediately after flowering
before the onset of new growth.
Propagating Medinilla
magnifica
Medinilla magnifica cuttings are slow but root easily in a mix of damp
sphagnum moss peat and perlite. Take a cutting with at least two
leaves, remove the top two-thirds of each leaf to reduce
transpiration and place under in a shaded cool place with a means to
keep the cuttings as humid as possible. I have only dome propagation in
a heated mist bed, but I would imaging a coke bottle that has had the
bottom and cap remove placed over each cutting should do.
Medinilla magnifica plants can also be propagated from seeds which is
my preferred method however it does take a bit of know how to achieve
good results or any result at all. After flowering Medinilla magnifica
produces many fruits that have large amounts of viable seed when ripe.
After removing and cleaning the seeds they can be lightly sown in seed
trays on a very thin layer of sphagnum moss peat that has good drainage
under it. The seed is then sprayed to drenching with a fungicide
suitable for preventing damping off. I use a mixture of the systemic
fungicide Benlate active ingredient Benomyl and Previcur active
ingredient Propamocarb mixed as directed on the packaging. The growing
medium must be kept constantly moist to achieve this I place the seed
tray in a plastic bag may take two to three years to reach flowering
size.
Medinilla magnifica seeds germinating on a thin layer of sphagnum
moss peat
Beware do not use coco peat it causes the germinating seed to become
deformed and to die.
Once the seedlings have germinated and fully developed the first
two leaves I slowly open to acclimatize the young seedlings then
completely remove the seed tray from the plastic bag.
As soon as the young seedlings are large enough to handle at about 5 mm
in height
Medinilla magnifica seedlings ready for transplanting
I carefully transplant then into multi growing trays with individual
compartments of about 3cm in size until their roots have are have
completely filled the space available at this stage they are
transplanted into small pots not exceeding three times the volume of
the trays.
This is done repeatedly until the plants have grown into mature young
plants of flowering size which should take about three years.
Fertilizing
For all of my epiphytic plants I feed frequently using a very dilute
amount of a variety of plant
feeds such as
EasyGro™ Flower and Fruit
is a 3:1:6(46) water soluble fertilizer, high in concentrations of
Potassium ideally suitable for crops during the flowering and fruiting
stages.
SEAGRO™ Bio-Fertiliser
Bionutrient with Enhanced Amino Acids. A fish emulsion rich in micro
& macro elements and 17 amino acids. Seagro is used as organic
fertilizer in agricultural practices for maintenance of crop health.
Seagro has a remarkable impact on crop quality as well as yield through
the activation of key metabolic processes. Seagro serves not only as a
nutrition and stress reliever, but also plays an important role in the
vitality of the microbial population in the soil.
Nitrosol Original Biological
Fertiliser
is the original formulation developed by Dr. Peter Kauzal, a veterinary
surgeon, from ruminant blood and bone. Nitrosol Original has a balanced
NPK of 11.5.7 plus trace elements and minerals and recommended for use
in all horticultural crops and home garden.
Fulvic acid.
Fulvic acid is group of chemicals formed when plants and animals break
down. It is found in the humus (organic matter) part of soil and peat,
and is also found in streams and lakes.
Fulvic acid benefits of increases root respiration and
formation,enhance plant growth and yield. Humic fulvic acid can
enhances pH buffering capacity, enhances photosynthesis and
respiration, increases cationic exchange.
Brings about an improvement in the transport of nutrients, making them
available in the areas of need. Increases the synthesis of proteins and
nucleic acids, which will facilitate the action of enzymes formed with
some amino acids and micro-nutrients.