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[
Introduction to
Plant Propagation
from Cuttings ]
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Seedling Transplant Trials
Many growers ask about the use of rooting hormone solutions to improve
transplanting of seedlings such as bedding plants.
Regarding seedlings, you must be very very careful in your
dosage. Trials indicate that application rates must be substantially below 25
ppm IBA (1/2 tablet per liter of Rhizopon AA Water Soluble Tablets)
Less than:
25 mg IBA per liter water =
125 mg IBA Water Soluble Salts per liter water, or
1/2 tablet of Rhizopon AA Water Soluble tablets per liter water
The information shown for Rhizopon
AA Water Soluble Tablets also apply to Hortus IBA Water Soluble Salts (1
tablet AAWST = 1/4 gram IBAWSS)
Higher solution rates of IBA Water Soluble Salts and
Rhizopon AA Water Soluble Tablets may be more suitable for woody plants
such as year old trees and bushes or older tropical plants.
Trials are necessary prior to applying to large scale
production. Be very careful in your dosing.
- Take a few plants and dose them @ 1, 5, 10 ,15, 20, 25
ppm IBA with some controls @ 0 IBA.
- Observe them for a few days (5-7 days should be
adequate).
- If there is toxicity you will notice the stems turn brown
... these plants will likely die.
If you get the idea, you must select your rate somewhat *below*
the threshold for toxicity. This is the same situation as when you are doing
rooting of plant cuttings ... too high a concentration of rooting hormone
will inhibit root formation and initiation.
Regarding the application method:
1) soil soak with water
2) soil soak with the rooting hormones solution
Remember, your new transplants need nutrients to assure
good plant growth. Be sure to apply the appropriate concentration and type of
fertilizer to your transplants at the time of planting.
Spray drip down is most useful for rooting of plant cuttings
not transplant improvement.
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