On the appearance of the severity of winter, the finer sorts of these
should have a simple protection, not because they will not do without
such care, but to prevent the alternate thawing and freezing of the
embryo of the bulb. To give them a covering three inches deep of any of
the following substances, will do perfectly well,--saw-dust not
resinous, old tan bark, half decayed leaves, or very rotten manure. The
last is preferable, as it would in part enrich the soil.
_Anemònes_ and _Ranunculus_ ought to be protected by a frame; the
foliage being above ground, none of the above will answer. It is not
necessary that the frame should be covered with glass, close boards will
answer perfectly, which must not be over them except during frost.