The Rose Hybridizer
In November
By Steve McCulloch
There is much anticipation in the garden during the months
preceding winter. Your crossing was completed by the 4th of July
and you have tended to your roses all summer long. By now your
rose hips should be ripe. The crosses that you made on to some
of the hardy shrubs or species may have already been ripe a month
ago. Harvest them now if they have been ripe on the bush for
quite a while.
Some of your late crosses still may not be ripe. Hips require
a long ripening period. They should be ripe in approximately
16-20 weeks after pollination. Rose hips often change color as
they ripen. You may see your hips change colors to red, orange,
yellow, red-brown, scarlet, black, deep purple or salmon pink.
Sometimes your hips will never change color. They'll just stay
green, just like a 'Granny Smith' apple! So don't be disappointed!
Plan on harvesting your hips soon. I recommend harvesting the
hips before the frosts arrive to your garden. If you have some
crosses that are especially valuable to you that have not ripened
yet, follow this advice. Remove the hips from the bush with a
3-4" stem and insert these stems in moist oasis or potting
soil. Place these hips in a sunny or bright location. Water only
when necessary to keep the medium moist. The hips will ripen
and change color in a few weeks to a month.
Most members of our group have found this method to be very
successful:
1. Shell the hips and remove the hard, honey seeds.
2. Wash the seeds in water. Remove all parts of the fleshy
hip from the seed.
3. Soak the seeds (keep them labeled!) in distilled or very
pure water. The seeds should remain in the water for 1-2 days.
4. Drain and remove the seeds and place the clean seed in
a small zip lock type bag with 2 tablespoons of moist perlite.
There should not be any free water in the bottom of the bag.
If there is - drain it out. Label the bag with a permanent black
marker. Include the date, the cross, approximately the number
of seeds, etc. Place these bags in a shoe box or something similar
in size and type.
5. Leave the seeds undisturbed at room temperature in their
bags for approximately 6 weeks. Check the seeds for sprouting.
Add a small amount of water if the perlite looks dry.
6. Next place the box of seeds in the refrigerator for 6 weeks
at about 40F. The lower shelf in your home refrigerator works
well. Varying the temperature can really cause the seeds to sprout
quickly. But don't put them in the freezer!
7. Weekly check the bags in the refrigerator. Some crosses
will sprout earlier than others. The parents and species that
you chose to use have a profound affect on the germination rate.
Make notes on which ones seem to give you good germination and
which ones don't.
8. If any of the seeds sprout, remove them carefully from
the bag and place them in small pot (2" diameter) of well
drained petting soil (peat/perlite 1:1). Place the small pot
into a clear plastic bag or sealed clear plastic shoe box. Keep
the container under light, but out of direct sunlight for at
least 1 week. Gradually wean the plants to room conditions.
9. Sow the seeds from the plastic bags after 6 weeks have
expired in the refrigerator. A 2" deep tray with drain hales
is great. Use a sterile potting soil (peat/perlite 1:1). Add
no fertilizer. Keep the rows labeled with the cross. Rows 1.5"
apart and plant the seed about 1/2"deep.
Good luck and good roses!
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