_Bleu_ I forgot to say, I love the way your plant grows such a nice clump! And you are ahead in the bloom aspect. Mine is just starting to make some blooms. I think the duration of light your plant gets is okay. As I mentioned earlier, try to water thoroughly once a week.
Here are two of mine right now. My awkward garden is angled a bit, so as you can see the plant tries to seek a bit more light as it grows towards the light. In some ways makes it grow unruly, but eventually it will temper itself when the super dry and hot weather returns and as more tree foliage grows, giving it more dappled shade. For now, I am just enjoying the bloom formation it does. My garden is extemely messy right now, the trees dumping lots of catkins and leaf kernels..my annual springtime woes!
Pelargonium crispum 'Prince Rupert'
Pelargonium hortorum 'Tricolor'