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I would root it on the tree (air layer).There are tons of youtube videos on air layering guava.
Rooting the cuttings is a better option than air layering.
I recently rooted one cutting from Ruby Supreme guava. I had 5 cuttings in different diameters and only one, a pencil size, rooted.
I rooted a bunch of brazilian guava cuttings (very similar to cattley) and used lignified but not woody scions about 1/8" diameter. Stripped all the leaves except for two at the top of the scion. Dipped bottom in Clonex gel and put into pots with spagnum/perlite mix. Put into a humidity bin (rubbermaid tub) under growlights. Added bottom heat set to 85 F. They rooted and pushed new growth in a few weeks.I have not tried with tropical guava yet, but Daleys had a youtube video that is basically the same method and it works for them.
Quote from: Seanny on November 12, 2017, 11:47:29 PM Rooting the cuttings is a better option than air layering.WHY??
Quote from: Galka on November 13, 2017, 12:50:41 AMI recently rooted one cutting from Ruby Supreme guava. I had 5 cuttings in different diameters and only one, a pencil size, rooted. Nice. how did to you do it?
Quote from: behlgarden on November 13, 2017, 10:33:59 AMQuote from: Galka on November 13, 2017, 12:50:41 AMI recently rooted one cutting from Ruby Supreme guava. I had 5 cuttings in different diameters and only one, a pencil size, rooted. Nice. how did to you do it?Added a few drops of rooting hormone to the water. Let the cuttings to stay in this solution for a couple of days, watching the water, then replaced with fresh water and so on every other day. The cuttings were on a sunny window sill for a month or so.
Quote from: Lory on November 13, 2017, 03:20:32 AMQuote from: Seanny on November 12, 2017, 11:47:29 PM Rooting the cuttings is a better option than air layering.WHY??Winter is here. Air layering is not good this time.When air layering the tip gets food from roots but not give sugar to roots. I would air layer on big trees but not small ones I have.