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Brambles
have the same general requirements as strawberries--well-drained
soil and full sun. If your soil is heavier or not
well drained, we recommend planting on raised beds.
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Plant
Spacing for Brambles
For summer and fall-bearing raspberries, we
suggest you set plants 28-30 inches apart
in the row and allow a minimum of 8-10 feet
between rows. Black raspberries can be set
at 20-24" apart in the row with 8-10
feet between rows. Set blackberries 3-4 feet
apart in the row and allow at least 8-10 feet
between rows.
Hint:
When planting bare root plants, use a hoe
to make a trench 2" deep the length of
the bed. Spread roots along the bottom of
the trench and cover immediately. Larger bare
root canes can be pushed down to proper depth
trying to keep extra roots at the 2"
level. This will promote suckers to develop
from the roots.
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Set
nursery mature and bare root plants 1-2 inches deeper
than they were in the nursery. The soil line around
the stem will indicate their nursery depth. Care
should be taken that the hole is large enough to
allow the entire root system to be covered. Spread
the roots out in the trench and set at about 2 inches
deep. Caution should be taken to prevent the
roots from being planted too deep. The fine
root system should not be allowed to dry
during the planting process. This can happen very
quickly on a warm, spring day. We suggest soaking
the plants for up to 2 hours prior to planting and
keep the plants in a pail of water as you plant.
We also suggest the use of a product such as Agri-gel
to prevent roots from drying. Special Note: New
growth on raspberries may not appear for 4-6 weeks.
The cane portion of the plant may never leaf out.
Check for root development by gently digging 2-3
inches out from the cane of the plant. During this
establishment period maintain good soil moisture
until plants are growing well.
Weed Control
During the growing season, cultivate regularly around
plants, but not more than 1 inch deep, because the
root system of raspberries and blackberries is quite
shallow. A tool called a scuffle hoe is helpful
for this purpose. It is also helpful to mulch plants
during the establishment year. Straw or plastic
mulch helps to conserve soil moisture and cuts down
on weed competition. Do not mulch after establishment
year. Please consult your State Cooperative Extension
service for recommendations on chemical control.
Fertilization
For optimum growth and production, thoroughly
incorporate light amounts of fertilizer prior
to planting. Home gardeners should incorporate 1/2
- 3/4 lb. per 100 square feet of 10-10-10 fertilizer.
Commercial growers should use 500 lbs. per acre
of 10-10-10 or make applications according to soil
and tissue tests. Additional applications may be
necessary according to weather and/or leaching conditions.
Trellises
Training and Pruning
We suggest that all brambles be supported by a trellis.
We have been successful using a T-bar trellis for
raspberries that supports 2 wires 12 inches apart
at 3.0 feet above the ground. See the accompanying
Diagram 1. Some varieties which are taller such
as Canby, Taylor, and Lauren might benefit from
a T-trellis with two wires--one at 3 feet and one
at 4 feet. Blackberries and black raspberries are
best trained to a four-wire trellis (Diagram 2).
A trellis keeps canes upright and fruit off the
ground, makes picking much easier, and maintains
good aeration throughout the planting which helps
with disease control. The laterals are wrapped on
the wires.
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Diagram
1
Diagram 2
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Pruning
Summer Bearing Raspberries
These varieties carry one crop of berries on the
overwintering canes during the summer months. For
best yields, prune out the canes that carried fruit
directly after harvest. Thin remaining new growth
to 6-8 strong, healthy canes per running foot of
row.
Fall-Bearing
(Primocane-bearing, Everbearing)
These varieties will have two crops. The largest
is borne in the fall on the tips of canes which
grew throughout the summer. A second crop is then
carried lower on those same canes early the next
summer. To have two crops, the planting must be
pruned as a summer bearer (follow the instructions).
Most
everbearers will produce an even better fall crop
if not allowed to fruit in early summer. To treat
these plants as fallbearers, mow off all the canes
after the canes have lost their leaves in very late
fall, or wait until early spring in colder areas.
Be sure to cut the canes as closely as possible
to the soil surface, leaving as little stub as possible
above the ground. The new, strong canes which grow
again that summer will bear an abundant fall crop.
Black
Raspberries and Purple Raspberries
Black raspberries and purple raspberries break buds
from their crown region in the hill and send out
few, if any, suckers. Prune plants to 4-6 canes
per hill. Both of these types of raspberry plants
respond well to a process called tipping, whereby
the 1-year old canes are pinched back as they reach
a height of 5-6 feet. This practice encourages fruiting
lateral branches to break from the main cane and
keeps plant height in check. Laterals, in turn,
can also be headed back in the spring to 10-15 inches.
Pinching back laterals prunes away winter damaged
buds and can help increase berry size.
Blackberries
(Thornless and Semi-Erect)
Some type of trellis support is recommended (see
diagram #2). A 3-4 wire trellis works best for this
type of plant. Tip 1st year canes when they reach
5 feet high in midsummer. Canes that fruited can
be removed anytime after they have been harvested.
Thin the remaining canes to 8 canes per running
yard of row. If grown in a hedgerow, thin canes
to 6-8 canes per hill. Wrap the laterals around
the wires before Mid-September, before canes become
woody and brittle.
Sometimes
thornless blackberries are managed by tying them
to a stake. In the staked-hill system, the canes
are wrapped around a stake 2 inches in diameter,
tied in 2 to 3 places, and cut off to the height
of the stake at 5-6 feet above ground level. The
plants are set 5-8 feet apart in every direction
and restricted to a clump. This is an easy to maintain
system and can be an attractive addition to the
home garden landscape. A trellis or staking is highly
recommended for the semi-erect, trailing blackberries
in order to keep the fruit clean and minimize canes
breaking.
Care
and Handling of Tissue Culture Bramble Plants
Our tissue culture plug plants will
be either green (right from the greenhouse) or dormant
(green TC plants that have been put through a chilling
period or hardening off period and have since been
stored in our cooler at 28 degrees F).
Green
TC Plants
Upon receiving your plants:
1) Open the box and open the plastic liner.
2) Check the moisture: cells should be moist before
planting.
3) Take care not to overwater, the plastic liner
may hold in moisture.
If
not planted immediately:
a) Cut the box top off, making a flat out of the
container.
b) Check the moisture - maintain good moisture
but don't overwater.
c) Hold in a bright, well-lit, cool area.
d) Do not store in refrigeration at 28 degrees
as other dormant plants are stored.
IMPORTANT:
Plant green tissue culture plants only after
danger of frost has passed. Water regularly
once planted until a new root system has formed
or the plant is well established. A new root system
will develop in 4-6 weeks.
Dormant
TC Plants
These are not sensitive to frost damage and can
be planted at the same time as dormant bare root
stock. In addition, they are much less sensitive
to water stress. Dormant TC plants can be held at
30-32 degrees F until planted.
Planting
All Tissue Culture Plants
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Plant so that the soil plug is well-covered with
soil using the same spacing as used for bare root
plants.
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Use care when applying herbicide on TC plants.
We have had good results using 4 lbs. per acre
of Devrinol 50W. In our experience, other herbicides
will damage these plants.
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Fertilize TC plants the same as bare rooted plants,
using 1/2 to 3/4 lb. 10-10-10 per 100 square feet
incorporated prior to planting. Once well established,
side dress with 10-10-10 to maintain good vigorous
growth.
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Maintain good moisture levels until the plants
are well established or for 4-6 weeks.
- If
you have any questions in regard to handling,
planting or caring for TC plants, please contact
us.
Please
Note
Foliar applications of soluble fertilizer have proven
successful in establishing green plug plants. Two
to three applications every 3-4 days using 5-7 pounds
per acre of actual N will provide enough nutrients
to establish the plants quickly. You may use any soluble
fertilizer (such as Calcium Nitrate or Miracle-Gro)
that you would use on your house plants. Once plants
are established, side dress as usual.
General
Planting Information | Raspberries
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