alright so my uncle wants to know what kind of fertilizer is best for concord grapevines. (ie 20-20-20, etc...) any info would greatly be appreciated ;)
In general, grapes respond to a complete fertilizer such as 20-20-20 or a fertilizer with the third number (potassium) the highest. Magnesium and boron are also likely to be necessary parts of a fertilizer program. More information is at "Fertilizing Grapes". -Tony
