plants you usually want to callous are succulents and cacti.

What are you rooting?

:)

The development of callus before sticking is only used for dormant hardwood cuttings. Soft and semi-hardwood cutting need sticking immediately or within a few days if refrigerated. Suberization is the term that applies to succulents. It just basically the drying of the end of the cutting. Suberization occurs with in several days but succulent cuttings can be left for up to several weeks depending on temperature, size of the cutting and humidity.

happyhoe
I know this is an old thread but in case someone can reply.
I sometimes get dorment fig cuttings which are supposed to be hardwood cuttings but these are really not lignified. During callusing or rooting process I usually lose these to desiccation, or rot, or mold. I use two methods for rooting/callusing: (i) cuttings wrapped in moist paper, placed in Ziploc bag and placed in high temp (78F~80F) environment or (ii) placed in clear plastic glasses with darin holes in a mix of Perliet-Vermiculite placed in high temp (78F~80F) environment.
I have good success with real hardwood (lignified, narrow pith) cuttings but dismal results with supposedly hardwood which is not lignified (due to rot, wrinkles/shrink or mold). What will be a better approach for rooting of such non-lignified dormant cuttings because I still have a few in the fridge as assurance cuttings?