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Time to repot?

Repot too soon and you stress the roots; too late and the plant stalls and dries out in minutes. Tell us where things stand and we'll say whether to do it now - and crucially, how much bigger the new pot should be. The most common mistake is jumping up too many sizes at once.

Verdict Within a month or so go up to about 15 cm / 6 in

Roots filling the pot is the signal to plan a repot soon.

How to do it: water the day before, slide the plant out, gently tease apart circling roots, and set it in fresh mix at the same depth - never bury the stem deeper. Water it in and keep it out of harsh sun for a week while it settles.

Only size up by one step - about 2-5 cm / 1-2 in of extra diameter. A pot that's too big holds a reservoir of wet soil around small roots and is a fast track to root rot. Spring and early summer are the best times; in autumn and winter, wait unless roots are bursting out.

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