Graduation in Hong Kong: campus flowers, family bouquets and colour
Graduation in Hong Kong at HKU comes with a flower stand: on ceremony days the university runs one in the Lee Shau Kee Lecture Centre, on the LG/F, selling fresh bouquets alongside bouquets made of soap flowers. Ceremonies fall twice a year, in May to July and again in October to December. A bouquet from the stand is an on-the-spot buy, while one from the family is chosen ahead of time, for its colour and for where it will sit that evening.
Bought on campus or sent from home: a bouquet for the gown
The campus stand solves one problem: flowers needed right now, on the day itself, with no order placed in advance.
A bouquet sent from home is a different kind of gift. It gets chosen well before the date, for its colour and its shape, and a card travels with it; the message on the card costs nothing extra. For the ceremony and for the photographs afterwards, a compact shape works best, held at chest height in front of the gown. Mini Bouquets and 11 Lavender Spray Roses both fit that brief.
Anything larger, like a jumilia in its airy wrapping or an armful of peonies, is better handed over after the ceremony. Both hands are free then, with no need to carry it through a crowded row of seats.

Red, pink and peach suit a happy occasion in Hong Kong, graduation included, so the Peach Signature Bouquet or pink-and-peach roses suit the day. Lavender spray roses and peony-style roses are a softer alternative to pink.
White chrysanthemum is the one flower to watch for. In Hong Kong it reads as a flower for mourning, so a bouquet that includes chrysanthemum is better chosen in colour rather than white. White flowers in general are not given here for a birthday, an anniversary or a wedding, and a family that keeps that custom will feel more at ease with a bouquet finished in pink or peach instead.
Stem counts carry their own small etiquette. Four is a number usually avoided; more on stem counts.
Graduation flower delivery in Hong Kong for the dinner after
By evening the bouquet is standing on a table at home or in a restaurant, which suits flower boxes or the "Airy Tenderness" Basket better than a hand-tied bunch, since neither one needs a vase to stay upright.
For a restaurant, the timing is agreed with the venue beforehand, so the bouquet arrives at the right moment, with dessert or alongside the toasts, rather than sitting on the table from the start. For graduation flower delivery in Hong Kong to a flat, the recipient is not called in advance unless the sender asks.
The florist photographs the finished bouquet before the courier sets off, and most orders go out on the day they are placed. The exact window is shown on the bouquet's own page, since it changes; delivery zones are free in the centre and charged at a flat rate further out. If you are ordering from abroad, the recipient's phone number is enough when the address is unknown; see sending flowers in Hong Kong from abroad.

For a bouquet to hold through the ceremony, roses are the easiest starting point. For the dinner afterwards, look at flower baskets or a box that stands on its own on the table. Where one flower says enough on its own, single-variety bouquets keep the choice simple.