Palm Seed Germination
INTRODUCTION
People who have bought or are thinking about buying
palm seed will have many questions about palm seed germination:
-How do I know if it's good seed?
-Should I soak the seed before planting?
-How should I plant the seed?
-What is the germination rate of palm seed?
-How long will the seed take to germinate?
-How deep will the first root put itself out?
-What should I do after germination?
There are no hard and fast rules which apply to each and every
palm species, however below we have tried to outline the basic
principles which will get you started successfully germinating seeds.
Much of this advice seems common sense to experienced palm collectors
but may not be so to the novice. We also encourage experimentation
and sometimes we can be surprised at what works (and what doesn't).
GOOD SEED
The first step in successful seed germination is good palm seed. This means
fresh fertilized seed which has not been eaten by weevils or other insects.
Each and every fertile palm seed has a small embryo inside the seed which is
either white, cream or yellow. This tastes good to insects. A sample of the
seed can be cut open to find the embryo. If one seed in a batch contains
an embryo, then the seed is fertile. Sometimes the embryo is prominent
and large relative to the size of the seed and sometimes very hard to find,
so don't give up too easily.
Also, different species have the embryo in different parts of the seed so don't
make any assumptions. Seed can also be dropped
in water and the good seed with embryo will sink. Sometimes, however,
good seed in its shell or fruit may float, so test the seed only.
A palm tree may produce batches of infertile seed because it is not
yet mature, because it is sick, or because it is dioecious and has
not been fertilized by the male.
The seed should be cleaned before planting because the fruit attracts
insects and some species of palm fruit contain an anti-germination
agent to encourage more widespread propagation in the wild. If the seed is
looking dry, soak it in water for 24 to 48 hours before planting. In fact,
seed left to soak long enough may eventually germinate in the water, although
we don't recommend this method of germination.
GERMINATION
The key elements to germination are heat and moisture. Up to
120 Fahrenheit (49 Centigrade) is required
for some species. Moisture is required but too much and the
seeds may rot. Seeds should be planted no more than the
diameter of the seed below the surface and some seeds germinate
best actually on the surface. In nature, the seeds which germinate are usually
half in and half out of the soil.
The substance the seeds are planted in should have the following
qualities:
-loose and light (so it's easy for the roots to penetrate and easy
to separate out the seedlings after germination)
-sterile (at least insect-free)
-holds moisture well
Burnt rice husk fits this description, for example, and any
commercial potting mixture will do just fine.
Seeds should be planted together with enough depth for the first
root to put itself out comfortably without having to wrap much. Some palms
put out very long first roots, but for most palms five or six inches
will be plenty.
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