Balloons
Flowers, of course, are very gentle and romantic, but if your chosen one is an extraordinary person, then look for a non-standard approach to business. Decorate a table in a restaurant or your apartment with bright balloons. The main condition is that there should be a lot of them! And tie a box with a ring and notes with love confessions to the ribbons in advance.
ADVICE! If you plan to propose in cold weather, it's best to move everything indoors - helium balloons do not tolerate frost well and shrink greatly.

Beautiful landscape
This is practically a win-win option at any time of the year. Find the most beautiful observation deck or panoramic view of the city and bring your loved one there. Decorate everything in advance with candles or flowers, invite a musician. It's hard to imagine a more romantic atmosphere!
ADVICE! In this situation, you should not hire a whole quartet - one musician will do. If it is a familiar street guitarist or saxophonist who suddenly starts playing a song that is meaningful to you, the recognition will be even more unexpected.

love quest
For this option, you have to break your head. Make a list of tasks for your soul mate - it can be from simple questions in the form of a board game, or a whole adventure with stops in places that are memorable for the two of you. At the end of each note with the task, be sure to write why you love her. And the main prize will be a box with a ring and your marriage proposal.
ADVICE! Tasks should not be too difficult and do not do too many of them - the girl will get tired and the final surprise will no longer be so joyful.

Like in the movies
Call your beloved to the theater or cinema, and at the end of the session, under any pretext, leave the auditorium, go up to the stage or to the screen - tell her why you love her and ask her to become your wife.
ADVICE! Find out in detail about the content of the play or film - so that everything ends well there. Hide the flowers in advance backstage. And it is better to warn the administration in order to avoid interference from the security.