Agapanthus usually emerge from dormancy during march and start into active growth. Which makes it the perfect time for removing last year’s old brown foliage ready for a new season’s growth.
You may also want to consider potting on well established plants into a new pot a few sizes larger than the one it is currently in. Agapanthus benefit from good drainage so we recommend 2 parts multi purpose compost to 1 part Horticultural grit or perlite.
If your Agapanthus is congested in a very large pot or an oversized clump in the garden I would recommend splitting and now is the perfect time of year for it. Once you have wrestled it out of the pot, use a serious tool such a a sharp spade, saw or our favourite an old butchers meat cleaver! Agapanthus are tough plants and respond very well to division so do not be shy. Agapanthus rhizomes are very tough and gnarly so a forthright approach is need. When dividing Agapanthus you shouldn’t take the divisions too small. But a large clump can be split it 4 or even 8 pieces then repotted.
Now is also a good time to start actively feeding and watering your Agapanthus, especially if they have been kept dry over winter. We feed our Agapanthus every two weeks from late march through to October with our own high potash Agapanthus feed to guarantee healthy growth and prolific flowering.
As a note of caution this time of year is often termed ‘fools spring’ as frost and snow can often come even though the days are becoming longer and milder. Be willing to protect new growth from a prolonged cold spell if necessary by moving the plant into a sheltered place or cover with horticultural fleece.d