How to fertilize annual flowers
Annual flowers need to be both grown in rich soil and also to be fertilized often in order to have the strength to bloom. It will, of course, vary how much and how often different annual flowers want fertilizer, but in general they want to be watered with fertilizer more often than other plants. So, follow the schedule and Planta will tell you when it's time for your plant to get some more fertilizer.
If the soil is wet - snooze this action, we will remind you again in 2 days.

Choose the best fertilizer
You can use any fertilizer suited for garden plants, annual flowers, blooming plants or any balanced fertilizer suited for potted plants
S ome examples when it comes to NPK*: 10-10-10, or 20-20-20.
Alternatively, you can also select a fertilizer that contains a bit more phosphorous and potassium since that will increase the blooming potential.
* NPK: Nitrogen (N), Phosphorus (P) and Potassium (K)
Recommended fertilizers

This is how to fertilize your annual flower
Mix the right amount of fertilizer with water according to the instructions on the package
Pour the solution over the soil
If possible, try to avoid getting the solution on the stems, leaves and flowers
Continue adding the solution to the pot until it starts to run out of the drainage holes in the bottom
After about 1 hour, check that the pot isn’t sitting in water - and if needed pour off excess water