Trimming an oleander is not difficult. The main secret is that oleander blooms on last year's shoots. And the rest is no longer rules, but creativity. Igor Bilevich advises watching:
Oleander planting, care, reproduction:    • Олеандр.  Размножение, посадка, особе...  
Oleander transplant:    • Биогумус и пересадка олеандра