e. It should not be opened unless the day is very
mild. One thing to remember is that wherever the plants are they
should have as much sun, as equal a temperature, and as little draught
as possible.

Watering

No exact rule can be given for watering; but it should be noted that
water ought never to be allowed to stand in the saucers. In winter,
one good watering a week with lukewarm water, applied in the morning,
will be sufficient. In spring, when the plant is more active, more
water will be needed, and in summer constant attention must be given
to watering. Remember, that not only the surface but the whole soil
needs moistening.

Flower-Pots

In spring time, if the plants seem to have outgrown their pots, or if
they are not thriving well, re-pot them in larger pots with the best
earth you can get. Water well after re-potting.

Turn the plants round every day, as the sun always draws them toward
it.

Indoor Plants

A list follows of suitable plants to be grown indoors. Green plants
are mentioned first.

_Aspidistra._--Of all green plants the aspidistra is the best to grow
indoors. (This plant indeed is so hardy that it will stand not only
draught but even a certain amount of gas.) Its smooth, beautiful
leaves should be carefully sponged every week.

_India-rubber Plant._--The india-rubber plant is a very handsome,
smooth, bright-leaved plant. It should not be given too much water.

_Ferns._--Several hardy ferns grow well in a window. The maidenhair is
very beautiful while it lasts, but it is a poor thing the second year
unless it can be put into a greenhouse and cared for.

_Ivy._--Small-leaved variegated ivy will grow under almost any
conditions. Its leaves should be kept clean. If grown up a small
trellis it is very pretty.

_Japanese Fern Balls._--In February and March one can buy Japanese
fern balls. The balls have to be soaked for two or three hours in
water (rainwater if possible) and then drained and hung up in a window
where there is not too much sun. They should be watered three times a
week. Gradually the delicate ferns will grow and unfold until the
whole ball is a mass of green. In November they should be put away in
a cool dark place until the following February, when they can be
started again.

_Miniature Trees._--Fine little trees can be grown from chestnuts,
beechnuts, acorns, and hazel-nuts. Collect the nuts as they fall and
leave them in a dark place, until about two weeks bef