Mostly Yellow
It is traditional in Thailand to choose yellow when buying flowers for a Thai person who is/has been ill (especially people in hospital), to say "I hope you get well soon".
We strongly advise that customers only give a yellow flower bouquet,
basket or vase arrangement to Thai people when they are ill and/or in
hospital. This is because Thai people believe many yellow flowers are
only for people who are ill. If a Thai person receives many yellow
flowers she may feel embarrassed. If she is with other Thai people when
she receives them, the other Thai people may think .. “That person must
be ill". (But ... a few yellow flowers in a bouquet, basket or vase
arrangement with other colours is no problem – they can be very
beautiful).
For more detailed advice about choosing colours for a Thai, Thai-Chinese or Chinese person, see our Advice page