Achillea issue

Dovefromabove

I would aim to water around the crown rather than directly onto it … but if you’re using a rose on the watering can or hose it’s not vital to keep the crown dry … 👍 😊 

Nollie

Slow-worm said:

after they've established you 'just know' how much they need.. you get to know your plants. 😊

Very true! It takes a while to understand both your growing conditions and the watering needs of individual plants in those conditions.