Something will work, because something is not working now and you will need to go through a process of elimination to find out that something! As Bill says, more info please...
• A lack of even one nutrient can affect growth. What are the tops of your roots crops like – nice green or pale or yellowing/red, bushy or stunted too? How comprehensive was your soil test? If you're happy with the quality of your soil test, then...
• What about very clay like soil which root crops struggle with. They like friable soil – are the roots forked at all, or very hairy?
• Did your seedlings dry out at all when tiny – that can stunt their growth for later?
• Sun is very important for root crops – do you know how many hours of full sun a day they're getting? It should be 4-6, any less is pushing your luck.
• On the other hand, carrots for example dislike too high temperatures; they're regarded as a cool crop. The different varieties available mean some prefer to be grown in early spring and autumn, whilst others are main crop and can stand higher temperatures.
• What varieties are you growing? What are the different root crops, besides carrot I presume, are you having trouble with? Radishes, beetroots etc?
• Have you tried rotating your root crops? If so, do you always find that still nothing works?
• Too crowded, competing with a crowd of other roots or weeds?
Do you have a photo or two you can give us, so we can see the growth, colour etc? More information is needed so we can turn "Nothing works", into "Temporarily nothing works."
Aug 09, 2009
poor root crops by: john
I can not grow any root crops larger than a small marble.I have had soil test .I have tried raised beds I have ample sun and water.I have added bone meal and other high phosperous fertilizer. I have followed almanack moon planting dates. nothing works. HELP
Aug 09, 2009
poor root crops by: john
bill i have had soil test I have tried raised beds I haveplenty of water from lake I have full sun I have added high phosperous fertilizer.I have tried planting by the moon, but I can not even growany thing much larger than a small marble
Aug 09, 2009
more info by: bill t
John,I suggest you give more information on how you are growing your crops before an informed answer can be given.
Yours sincerely Bill T.