You need to say where you are, how you have cared for them so far and provide a photo.

Rough translation (thank you, Google) : "I have these plants since December and they were in perfect condition outside with beautiful flowers but I have noticed since the end of May that the plants have dried up and no longer bloom, I have them planted outside in a bed where the sun shines in the mornings but in this season the sun is a little stronger, what can I do to get them back?"

Thanks for doing the translation, I'm now doing the same thing with Google translator to answer, thanks! In relation to the plants, I am in Fort Lauderdale, FL and I water them every afternoon if it does not rain or the substrate is dry, here are some photos of their current state

This picture was in February

night time is a usual recovery period... and you say you water only in the heat of the day.. so there is no water for them to recover with .. so id probably water them towards dusk ...

also.. i suspect the wall and reflected sun and heat is not helping the plants.. they are baking lets say ..... since the bed is so thin and in addition.. its bricked in with more heat retaining brick ..

it might take you years to figure out what will work in the bed .. good luck..

sometimes the plant you pick just isnt right for the location ...

and i cant tell what the plant is from these pix ... unless flora can pull her magical intuition to name them.. we will need some closer pix of the leaves.. and flowers if any are left.. though i dont see any ..

ken

ps: one thing that might work there would be moss rose.. aka portulaca .... that suggestion is for next year

Ken, the plant was ID'd in the thread title - Plectranthus 'Mona Lavender.' In warm climates where it can be grown outside, it flowers in winter and early spring but shuts down as the weather heats up. If the site is not too hot and sunny for it, it should come back to life and flower again this winter. I would just cut it back and keep it well watered for the time being. Unless the OP wants something that looks good year round.