Agriculture Reference
In-Depth Information
The result is a plant open to moisture and sun
that can get on with the job of being beautiful
(see Figure 4.24).
Table 4.7
Plants to deadhead through the season
#
Alcea,
Hollyhock (rub off spent flowers)
**
Anthemis
spp.
‡
Bergenia
*
Centranthusruber,
Valerian
*
Cosmosatrosanguineum
‡
Crambescaberima
#
Cynara
spp.,
Artichoke, thistle
#
Delphinium
spp.
†
Epimedium
spp.
‡
Euphorbia
spp.
*
Gaillardia
spp.
†
Heleborus
spp.
†
Heuchera
spp.
#‡
Leucanthemumsuperbum
*
Limonium
spp.
*
Linaria
spp
‡
Pelargonium
spp.
*
Penstemon
spp.
*
Phloxpaniculata
†
Pulmonaria
Lungwort
#
Pygelius
spp.
‡
Romneyacoulteri
#
Rudbeckia
#
Salviaambigens
*
Salviachamaedroides
#
Salviafarinacea
*
Tanacetum
spp.
#
Thalictrum
*
Tracheliumcaeruleum
#
Veronica
When the flowering season is over
*
Cut down in the dormant season to a base of sturdy branchlets.
#
Cut to the ground completely, new growth will come (or has
arrived) from the base.
†
Remove old leaves before the next growth season.
**
Plants that may be cut back by two-thirds and will rebloom in
the same season given good growing conditions.
‡
Evergreen species should retain their leaves over the dormant
season; only the flower stems are removed.
Herbaceous perennials
The most beloved of all f flower gardeners,
herbaceous perennials are quick growing
small plants that do not form woody tissue
yet persist in the landscape for at least
three years. Depending on species and
climate, they may be evergreen or
deciduous and are grown for their f flowers
and/or foliage. Many plants will die
back to a persisting root, crown or tuber
that will recreate the whole plant again
in spring.
Many f flowering species require
deadheading throughout the season. This is
the removal of any spent f flowers so that new
f flowers can be produced. Simply cut the
f flower stem off at its base. This will either be
at the base of the plant (Figure 4.25) or back
to the next bud, node or growth point (see
Table 4.7).
Figure 4.25
This
Achillea
can be cut back to a viable bud
on the flowering stem or to the ground if there are no side
buds.
