I was never successful when mine was in a pot,Robertmichael.so planted it in the garden ,and it has done well..maybe it dried out sometime in the summer,hard to believe after the rain we had..but that is when the buds are formed for the following year..you have it in the right compost,but maybe it has lost its goodness now,or it is outgrowing the pot it is in..It would be fine,Im sure,if you could plant it out..an area that doesn't get morning sun would be best.. a north facing shaded area is good...

I have one in a trough (will take a photo in the morning and you can see how well it is doing). However I have another one in a pot which was supposed to be a peachy colour which has never flowered.

Have you positioned the pot so that it does not get the morning sun in early spring? If the shrub gets any frost on it and then the sun shines directly onto it the flower buds are killed off. If the Camellia has been in the same compost for the past four years it needs feeding. You can buy and ericaceous feed from the GC, loosen the top inch or so of soil and add. Camellia's are much easier grown in the ground than in pots.

Anything that eventually gets big, like a Camellia is unlikely to thrive in a pot as the roots get restricted. The compost soon gets stale and sterile.Ideally plants like that should be grown in the ground If you have to use a pot try changing the soil at least every 2 years using a bigger pot but don't expect too much.

Camellias mustn't dry out in June/July when they are putting on growth for the following year's flowering. That's also a good time to feed them. In pots they really have to be spoilt to get the best from them, so, as has been said above, either get them into a good spot in the garden (west/north-west facing, in neutral to acid soil), or be a more powerful god to them in pots.

Watering is most important during the late summer for it is then that the immature flower buds are formed. Also a couple of feeds with sulphate of potash or tomato fertiliser will help. Growing in a pot is not always a bad thing as shrubs will often flower well when under a little stress. Having said, if it fails to flower next year, stick it in the garden if your soil is neutral to acid. If not, give it away or resign it to the compost heap and try another one.

Thank you to all who answered our plea for help. We will certainly try the suggestions.