Raising annuals
indoors From
Bedding
Plants After sowing the seed After sowing, most seed needs a
covering of compost, although plants with
small seeds like begonias and petunias can
simply be pressed gently into the surface
of the compost. Over the years I have
found that this gentle pressing is very
useful, reducing the amount of fine
compost that needs sifting over the seed
to a covering as deep as the seed itself.
Some gardeners use an old kitchen sieve
for this purpose but I find this is too
fine and use a home-made sieve made by
tacking a square of greenhouse shade
netting to a light wooden frame.
Vermiculite can also be used as a seed
covering but is less easy to manage than
compost. Immediately after sowing, write
the label giving the name, source of seed
and date of sowing. Once a few pots have been sown, they
need watering. I prefer to water gently
with a fine rose on a watering can,
tipping the can to get the water flowing
before moving the spray over the pots,
then moving it away before stopping - this
avoids huge drips disturbing the seeds.
Some gardeners prefer to stand their seed
pots in a bowl of water so that water is
soaked up from below until the surface
darkens; but when the pots are removed,
peat-based composts tend to shrink away
from the sides of the pots. In either case
it pays to add a copper fungicide to the
water to help prevent damping off. When surplus water has drained away,
the pots can go in the propagator. Most
seeds do not need any more darkness to
encourage germination than is provided by
their covering of compost, and are covered
with paper (brown paper or old newspaper
will suffice) simply to prevent them
becoming too hot. If your germinated seeds are removed
from the propagator as soon as they
sprout, the whole propagator can be
covered with paper. If your facilities are
restricted, the seed pots must be covered
individually. The pots will need a clear
moisture-retentive covering under the
paper. If large seed trays have been used,
a rectangle of glass and a piece of paper
can cover each tray. On a small scale,
this is more difficult. Fine, uncovered
seed is in particular danger of drying out
and here a piece of clingfilm stretched
over the pot is useful. Some gardeners use
rounds of glass or rigid plastic, some use
larger sheets of glass to cover a number
of pots. I find that for most seeds, if
the lid is on the propagator, it is
covered with paper to exclude sun and is
not placed in a sunny spot, then no
additional moisture-retentive covering is
required, although careful misting or
gentle watering may sometimes be
necessary. Once in the propagator, seeds should be
checked twice a day as some, like
marigolds and dahlias, germinate very
quickly. As soon as they appear, any paper
covering should be removed and then glass
or clingfilm removed a day or two later.
At this stage the pots are best moved to a
slightly cooler temperature where the
seedlings can grow on until the seed
leaves have expanded. Watering should be
checked regularly, and a copper fungicide
added to the water as a precaution against
damping off.
The
advantages of a greenhouse
Raising
plants on a windowsill
Using
a propagator or heated mat
Choosing
pots and trays
Compost/Potting
soil
Seed
sowing technique
Pricking
out the seedlings
Looking
after seedlings
Planting
out
Annual
Manual