If you are unused to succession planting, then these are your spreadsheets, based on my knowledge, experience and a good deal of input from other sources (Johnny's seeds, Sarah Funk) but are tailored to our conditions (and then yours)
If you need to know when the flowers will be ready, then use this calculator. It will tell you approximately the week that you can expect flowers from a particular planting. Match harvest #1 date with planting #1 date and so on. You most certainly don't need to plant all the successions (unless you want to - 😂😂😂)
What to grow - the ultimate list of flowers. 59 types of flowers with harvesting notes, germination requirements, spacing information, seed covering information, average stem count, how many plants to plant in different bed sizes and a quick reckoner for how many stems of each sort of flower you are likely to get.
This is my opinion of what to grow only. Originally the list went down "Zinnias" but I then added more types, so that I got a wider base than just what I grow. All the information about the varieties are on Sheet 1 "Cut flowers". If you want a quick reference, on Sheet 3 "Phase Three" you can add the last frost date as your last frost date - 30 days/1 month, and it will match the dates for planting your seeds under cover in an unheated place. More detail for planting dates is given in the other set of dates under the Succession planting Lesson
In our moderately temperate climate I can get flowers very early. I have to plant early, and then cover the seedlings with frost cloth, once planted out. They take longer to flower than if I were to plant them later in the season, but it does mean I can have super early flowers, without a heated glasshouse (in my dreams).
🎆 Want to have vegetables most of the year round? Check out this spreadsheet and start your food planting