BASIC RULES of SEED
SOWING
Seeds need water and oxygen to germinate, so they are best started
in a
light, loose soil that will
not compact, get soggy, or crust over. Free flow of water & air are a
must. Cover seed with 2 -
4 times their thickness of soil. Large seed can be soaked
overnight and planted singly.
Barely cover small seed, and sprinkle fine seed on the surface and water
by misting. Plant flat seed
edgewise and winged seed with wing uppermost or broken off. Sowing too
thickly wastes seed and
weakens the crowded seedlings, but some kinds sprout best if crowded.
Lightly tap soil to insure
good contact with the seed. Keep soil moist, not soggy,
and do not allow to dry out.
Common causes of failure are soil too heavy, wet or cold, or allowed to
dry out, not giving slow
seeds long enough to come up, pests eating the seeds or seedlings, and
not giving dormant seeds the
proper pretreatment. Common causes of seedling loss are damping off
due to poor air circulation
& over watering, drying out or burning due to placing in full sun or
outdoor conditions too
quickly, transplanting shock, and damage by insects, slugs and
snails at night.
Most seeds germinate best
at warm (70°F) temperatures.
Plants from temperate regions, the
arctic, high mountains and high deserts often germinate best at cool
temperatures. Plants from
winter-rain areas like California, the Mediterranean, Chile, S. Africa
and parts of Australia also
like cool temperatures.
SEEDS WITH HARD SHELLS
These have hard impermeable shells and need nicking or scratching
the coat to allow water to
enter and the seed to germinate. The best results are from the least
amount of nicking that will
allow water to enter and the seed to swell. Many failures are due to
over-nicking and damaging the
seed.
Different seeds need varying amounts of nicking. Most do best with
lightly rubbing on sandpaper or a
file until just the very outer coat is scratched. Often just scratching
with a knife-point or
scriber works. Others need serious nicking, sometimes with a hacksaw
until the white interior shows.
Nicking seed one by one can be tedious but is most effective. Larger
lots can be rubbed between two
boards covered with sandpaper, or shaken or tumbled in a can lined with
sandpaper. Then soak the
seed overnight and any that don't swell or soften should be re-nicked
and soaked again until
swollen.