...... and not a great success!!

According to the info that came with them (wife got them off a shopping
channel!) they were supposed to yield around 10lb, yet when we've weighed
them it's more like 2lb. We waited until it had flowered and the leaves
began changing colour, as instructed but the amount we've got is a major
disappointment.

We still have 2 tubs left and are wondering what to expect from them as they
are different varieties.

Any idea where we might have gone wrong?