Posted: 18/09/2016 at 11:50
If they're surplus to requirements, cut off the runners where they leave the parent plant and chuck 'em on the compost heap.
All those you pot up should grow into healthy young plants in the next few weeks - until the weather gets cold. It's a bit late for this (August is the usual time) but it'll do.
Use 3" or 4" pots; if you're going to keep them in pots you can move them into bigger ones (but they needn't be very deep) in the spring, otherwise they can go into the beds then. Official policy is to remove all the flowers in the first summer to allow the plants to develop a good root system and build up their reserves without fruiting, but most people don't bother, and are content with a smaller but quicker crop.
Next year, don't allow them to make any new runners (i.e. cut them off as soon as you see them) until they've finished fruiting, then allow only one per plant, with only one plantlet on it. This will double your crop, and do the same in subsequent years.
After each plant's third year, dig it up and compost it; let the youngsters do the work. The old ones get less productive (don't we all?) and tend to get diseases.
They respond well to lots of compost, both in the soil before planting and as a top dressing every spring. Kill slugs mercilessly and net well against birds. Enjoy with cream.