The invention relates to a modeling method for achieving an alpine rhododendron ancient stump with flowers in multiple colors. The modeling method includes the following steps: A, wild alpine rhododendron ancient stump
root system processing: scarifying and planing soil around an ancient stump
root system, enabling the root to be exposed out, cleaning up the transplanted ancient stump root, spraying bactericide for sterilization, and carrying out local sterilization on truncated root wounds generated during
transplanting digging, B, inarching alpine rhododendron plantlets with the
seedling ages of 3-5 years and different color systems of red, yellow, purple, pink and white and in different varieties to the periphery of a same wild alpine rhododendron ancient stump in a surrounding mode, giving consideration to layered distribution of the different color
system colors during inarching, and enabling root systems of the inarched plants to be in
close contact with the ancient stump
root system as far as possible, C, after inarching is completed, backfilling a container with original soil or prepared growth matrix, and D, thoroughly watering the alpine rhododendron ancient stump at the first time, and enabling a renovated
root ball to be sufficiently wetted. According to the modeling method, the method that the multi-color-
system and multi-variety rhododendron plantlets are inarched to the wild rhododendron ancient stump is creatively adopted, a mutual-assistance symbiotic relation is formed between the inarched plants, all parts, such as roots, stems and leaves, of the independent plants are reserved, and meanwhile the independent plants depend on each other, help each other and are symbiotic to form a whole.