HOW TO GROW CANNA LILLY
FROM SEED
Canna Seed Propagation
Propagation of canna
lily by seeds is possible, as many varieties produce viable seeds. Since most
of the plants with dazzling flowers are hybrids, starting canna lilies from
seed may not give you the same variety.
Nevertheless, if you find it interesting to raise plants from
seeds just to find out how they turn out, it is definitely worth a try.
Moreover, you are not likely to be disappointed, as the wild varieties of canna
lilies are all rather pretty, with striking colors and markings.
Canna
Lily Seed Harvesting
So when can you
harvest canna lily seeds? Once the flowers are spent, a cluster of seed pods
develop. The pods are green, spiky, round structures that usually contain one
to three seeds. The pods are harmless in spite of their outward
appearance.
Canna lily seed harvesting should be done once these seed
pods become dry. When pods open up revealing the black seeds inside, you can
easily squeeze them out. They are quite big and easy to handle.
How to
Germinate Canna Lily Seeds
Can you plant canna
lily seeds directly in the garden? Canna seed propagation is not as easy as the
seed collection. The seeds do not germinate when planted directly in the soil.
The tough seed coat is the main obstacle. Canna seeds have to be prepared beforehand
by softening the seed coat to encourage germination. Canna seed propagation
involves soaking, heating and scarification. Sometimes it takes a few attempts
to get it right. You should start the process at least one to two months
before you plan to plant it outside. Germination usually takes one to
two weeks.
Soaking
–
Canna seeds should be
soaked in water for a minimum of 24 hours. Some recommend using lukewarm water
for soaking. Use of a commercial medium such as Jiffy Mix, may be ideal for
germinating canna lily seeds. Make small depressions in the medium and put in
the seeds. Cover with the mix and water.
After planting the seeds in the medium and watering, the
container should be covered in plastic wrap and kept warm indoors. A constant
temperature of 70 to 75 F. (21-24 C.) is necessary to initiate germination. You
can use a heating pad to maintain the temperature.
Scarification
–
Another method to
encourage canna seed germination is by rubbing off a bit of the seed coat
before planting. Use a file or sandpaper to scrape off the seed coat. You
should keep rubbing until the whiteness of the endosperm becomes visible.
Scarified canna seeds
can be planted directly in the medium without soaking, as water can easily get
across the seed coat now. But the container should be kept warm throughout.
Canna lily is a monocot, with just one seed
leaf emerging first. When the seedlings are over 6 inches in height, they can
be transferred into pots. Planting in the garden should be attempted only after
all danger of frost is over.
Can I Transplant Cannas?
Can I Transplant Cannas?
Not only can you
transplant and divide canna lilies, but you actually should every few years to
prevent overcrowding, disease and pests. Pests and disease often occur on weak,
unhappy plants and dense, crowded plant structures with poor air circulation
and lots of hiding places.
Canna flowers are not
true lilies and their root structures are more like irisesthan lilies. Like
iris plants, canna rhizomes multiply quickly and eventually older rhizomes in
the center of the mass can be choked out. Dividing perennial grown cannas every
3-5 years will keep them growing in smaller healthier clumps.
Transplanting canna lily plants is a great way not only to
continually enjoy them but to create dramatic backdrops, borders or privacy
screens in the landscape.
How and
When to Transplant Canna Lilies
In zones 8-11 where they grow as perennials,
dividing and transplanting canna lily plants should be done when they have
finished blooming and the foliage begins to die back.
Of course, knowing how
to move a canna lily without causing damage is important too. Carefully dig up
the rhizome mass and cut any remaining stems or foliage back to about an inch.
Brush off any soil stuck to the rhizomes so you can see the joints where new
rhizomes grow from older ones. You can use a sharp, sterile knife to cut these
rhizomes apart, but they also usually break apart cleanly and easily. Each
section you cut or break off should have at least one eye (similar to potato
tubers) and preferably some roots.
After digging up
cannas and dividing their rhizomes, many gardeners will dip them in a solution
of 1 part bleach to 10 parts water to kill any infectious diseases or pests.
In warm climates,
divided canna lilies are the transplanted 6 inches deep, and the rhizomes will
settle into their new home through winter. In cooler climates, zone 7 or lower,
the rhizomes need to be dried out, then stored indoors throughout winter in a
location that does not get colder than 45 degrees F. (7 C.). In spring, when
all danger of frost has passed, these stored canna lilies can be replanted
outdoors in the garden or containers.
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