Radish Success?

[Vimto]

I have attempted to grow radish from seed with poor results. I purchased a packet of Radish, French Breakfast 3 and sowed them outside in a large pot of new multi-purpose compost about 1.5" apart. They germinated well in about ten days and have at all times looked healthy. They came on well with vigorous growth and are now about 10 inches high. The problem is that the roots have not developed hardly at all with only the odd one forming any sort of useful salad vegetable and any that have developed are small and on the woody side. What am I doing wrong?

[Chipchopper]

Possibly too shady ?.
They do best in a sunny spot.

[Vimto]

They are in a south facing aspect and have been watered well so that's not the problem.

[Clanad]

A couple of things from experience here in the U.S. Radishes (as well as other root crops) don't like a lot of fertilizer... to over fertilize or being planted in freshly fertilized soil will result in large leaves and no roots.
Additionally, while radishes like about 5 to 6 hours of sunlight, they really should be planted in an area that gets some shade during the daytime hours.

Lastly, we've experimented with grandad's old maxim of planting according to the Moon's phases. Surprisingly, our records indicate somethings going on with this ancient thought process. However, (you'll need to consult Google for explanation of terms) thequote[waning gibbous[i] cycle is thought to be great for planting root crops if following the [i]Synodic] method. We're in the midst of the Waning Gibbous period for this month, by he way...

If interested, see here:

http://www.the-gardeners-calendar.co.uk/moon_planting.asp

Luck!