Definition of inarch in US English:



[with object]Horticulture
  • Graft (a plant) by connecting a growing branch without separating it from its parent stock.

    ‘this infestation can be countered by inarching a tolerant rootstock’
    • ‘Some times, the grafting is done by inarching, but the process is cumbersome, expensive and not very satisfactory.’
    • ‘The method of inarching or approach grafting is quite cumbersome and time consuming, but it is still the leading method for commercial propagation of mango plants.’
    • ‘Other methods of propagation which are sometimes employed are inarching and shield-budding.’
    • ‘It is necessary to resort to inarching when the roots as well as the trunk have been girdled.’
    • ‘It usually requires from four to six years for layered or inarched trees to bear.’


Early 17th century (formerly also as enarch): from en-, in- ‘into’ + the verb arch.