Mixed bouquets in Singapore: one bunch, stems from many countries
Mixed bouquets in Singapore are tied from flowers that travel in along many different supply routes. No single country supplies more than about a quarter of what arrives: Malaysia, China and the Netherlands lead, then India, Thailand, Indonesia, Kenya, Vietnam and Ecuador fill in the rest. One tied bunch brings together flowers that arrived by different roads, and the choice starts with which flower leads the bouquet and what its colour will tell the person receiving it.
Nine supplier countries, one ribbon: what a Singapore mix ties together
Malaysia supplies roughly a quarter of what lands here, chrysanthemums, gerberas and tropical cut flowers grown on the cooler farms of the Cameron Highlands, which sell directly into the Singapore market. China supplies the next share; roses, chrysanthemums and lisianthus also come from China and Taiwan. Roses and lisianthus are the same two flowers that make up a bouquet called Roses with Lisianthus. No florist can promise that the particular stems in any one bunch came from that exact route.
The Netherlands ships lilies, tulips and delphinium, and India adds its own roses and lilies, so a lily in a mixed bouquet here may have come from either country. Singapore once grew its own cut flowers too, but only orchids, and that trade ended when the Mandai gardens supplying it closed at the end of 2010. That spread of routes is what makes mixed bouquets in Singapore read differently from a single-flower order: each stem has its own journey before the two or three of them meet in one hand-tied bunch.

Checking the chrysanthemum's colour before a happy occasion
Chrysanthemums reach Singapore from both Malaysia and China, which is why they turn up often in a mixed bouquet. Among the Chinese majority, white and yellow chrysanthemums are associated with funerals and condolence, and a white one is not a flower to send for a birthday. Red chrysanthemums carry the opposite meaning, celebration, weddings, good fortune, and they have no place at a funeral.
Before a happy occasion it is worth checking the chrysanthemum's colour on the photo sent before the courier leaves, rather than guessing from the bouquet's name. For a condolence call on a Chinese family, a white arrangement is appropriate, but there should be no red in it. Colour is read as closely here as quantity: stem counts are read here too.
A mix to your own brief: lead flower, palette, a photo first
Describe the occasion and the budget in a chat message, and the florist sends back several options with photos and prices before any payment is taken. A photo of a bouquet you like works just as well as words: the florist can point to similar work already done for someone else.
The lead flower sets the character of the bunch. Hydrangea, for one, carries the Hydrangea and Misty Bouquet, its dense round heads softened by gypsophila around them. Anyone set on a single flower and nothing else is better served by mono bouquets, while a free hand for the florist to mix shape and colour belongs with designer bouquets.
If a named flower is out of stock, the florist substitutes one close in shade and price, and the swap is visible on the photo sent before dispatch, with time to ask for a change before the courier sets off. The stems themselves are bought only once the order is paid for, not kept on a shelf waiting for a buyer.

Mixed bouquet delivery in Singapore works the same way end to end. A photo goes out before the courier leaves, and most orders are handed over the day they are placed. The exact timing is shown on the bouquet's own card, and the current delivery terms cover zones and timing. Where to start depends on which flower comes to mind first: a single kind points to roses, a hotel desk or a boardroom points to flowers in boxes.