At its best:
Jun, Jul, Aug, Sep
Add crocks to the bottom of the pot to aid drainage, and fill two-thirds with compost.
Add slow-release fertiliser and water-retaining gell to the compost, and mix it in with your hands.
Add the stipa and osteospermum first, and tuck the santolina in around the other plants. Add compost to fill the gaps and firm in well. Water the pot thoroughly and leav to drain before moving to its final position.