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The rims were hidden by an edging of flat stones resting on a
collar of cement. This was found necessary in order to prevent
the water from overflowing, instead of passing along the
channel to the next tub. The stones were of all shapes and
sizes, and were so arranged that they did not follow the barrel
rims exactly, but produced small angles and crevices, with an
occasional larger piece of rock jutting out over the water.
When finished, no two pools were of exactly the same
shape.
Simple
steps of rough stone lead down to the sunken water garden
from its upper end, passing behind the rock mounds. In the
joints, ivy-leaved Toad Flax, Campanula Pusilla, and some of
the smaller Saxifrages have become established. The pools
nearest to the path are also approached by steps, with a
stone slab at the edge to give convenient foothold for
closer examination of the Lilies.
When
making this garden, adequate means for supplying water to
the bog plants themselves was unfortunately overlooked. As
it is, they are occasionally refreshed and the soil kept
moist, from the water barrow. This involves a
little extra labor, which, I think, might have been
avoided. A small iron cistern could have been sunk in the
ground at the point where the supply pipe emerged from the
rock mound.
An
overhanging edge of stones would have given it the
appearance of a small spring, and an easy approach would
have constituted it a useful dipping pool. Some inches from
the top an outlet would make contact with the cement
channel, so that after using as much water as was necessary
for soaking the bog soil, the simple method of turning
on the supply at the reservoir would refill the dipping
tank, causing it to overflow down the channel, and refresh
the aquatics in the tubs.
An
overhanging fringe of Hart's Tongue would look well near
the tank, and in the stonework joints, the common Polypody,
the Oak and Beech Ferns would thrive.
Only plants of small size can be used for these miniature
gardens, everything must be planned on a reduced scale. For the
tubs the larger Nymphaeas are, of course, out of the question,
but in one of them we may grow N.pygmaea, a diminutive Lily
with white flowers, in another, the pale yellow variety
Helvola, which is a seedling from N.pygmaea, and was raised by
M.Latour-Marliac. Pontederia, with arrow-shaped leaves and
spikes of blue flowers, would also be suitable, as would the
beautiful Cape Pond flower (Aponogeton). The leaves lie on the
surface of the water, and the white waxy flowers, sweetly
scented, are raised slightly above it. There is a pink flowered
variety, roseus.
In
the moist bog soil, Primula Farinosa and P.rosea will be
found, small patches of the native yellow Saxifrage
(S.autumnalis) being placed near the sides of the
watercourse. The Bavarian Gentian (G.bavarica), with
blossoms of iridescent blue, is likewise at home in the wet
bog.
A
charming plant for contrast is the dwarf Bunch-berry
(C.candensis), distinct as to its cream colored bracts and
scarlet berries. In Sphagnum, the Droseras and the smaller
plants mentioned elsewhere can be established.
From
the American swamps we get the Meadow Beauty (Rhexia
Virginica), a beautiful dwarf plant, with deep rosy flowers.
For carpeting, in addition to the mosses, there is the
Moneywort (Sibthorpia), and in shade the hardy Adiantum
pedatum and the American Mayflower (Epigaea Repens). One
corner in half shade must be set aside for a clump of
Cypripedium Spectabile, and at the back Osmunda and certain
of our smaller Spiraeas would relieve any tendency to
flatness.
It
is the intention of the owner of the water garden we have
been considering, to make considerable alterations in
the shrubbery which bounds the bog margin.
In
course of time the majority of the laurels will be removed,
and their place taken by Rhododendrons and the choicer
flowering shrubs. Peaty soil will be provided in which
colonies of Lilies can be established, with ferns in the
damper quarters. Short vistas will be opened from the bog
garden side, so as to soften the present hard dividing
line.
The
two gardens, water and shrub, will gradually merge into one,
and the plants range from actual aquatics to those which
inhabit the dry peaty clearings among the Rhododendrons. It
is always best to forecast other schemes, and arrange for
future developments when planning alterations.
In
very small gardens indeed, where space cannot be spared for
even the above modest attempt at water gardening, isolated
tubs may be used.The water supply will be renewed by hand,
taking care to disturb the plants as little as possible.
Some gardeners never change the water in tubs and small
basins, but find that a few newts suffice to keep it
moderately clean and fresh.
A
water garden suggests something elaborate and
costly, but there are many who derive no small amount
of pleasure from the miniature charms of a single Lily in a
tub, with a fringe of bog plants growing in a moist, peaty
bed beside it.
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