Important rule: The more the better! You can't burn your roses with humus providers, it's not a fertilizer.
A layer of minimum 5 cm is advisable, more is better.
Now is also a good time to give volcano rock dust. It brings essential elements and minerals into our soil and makes the soil more airy. You can give a handful around the foot of your roses. Just work it in lightly.
And now your roses are ready for pruning by the end of this month!
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