They are, therefore, stratified in a callusing bed where moisture and temperature can be controlled.
callusing can then take place in time to allow of fall planting.
If cuttings are buried so deep that they cannot sprout, callusing may be hastened by placing them in a mild temperature.
It is usually better, however, to place them for several weeks in a callusing bed before planting.
"hardened skin," 1560s, from Latin callus, variant of callum "hard skin," related to callere "be hard," from PIE root *kal- "hard" (cf. Sanskrit kalika "bud," Old Irish calath "hard," Old Church Slavonic kaliti "to cool, harden").
callus cal·lus (kāl'əs)
n. pl. cal·lus·es
The hard bony tissue that develops around the ends of a fractured bone during healing.