Post by Jack-of-all-biers on Oct 27, 2020 9:18:19 GMT 10
I've found some resources in the last three or so years since getting into growing hops and thought there may be interest for some. I intend this thread to be a resource for those who may have an interest in checking a potential issue with their own plants or at least assisting in diagnosis. It's not intended to be a thread for generally spruking how any one particular growing method (organic/hydroponic/JAMAD/whatever) ensures no deficiencies ever occur, as some of us maybe follow those methods and these things come up from time to time no matter the growing method. It's good to be able to identify these problems when they do come up, as the solutions are often easy. So if there is a problem that needs help or you have a resource for nutrient deficiencies in hop plants please post here
The catalyst for me creating this thread was yesterday finding one hop plant showing yellowing tips on young leaf tips (previously I'd noticed a couple of deformed shoots also). The below 9.pdf seemed to indicate possible boron or calcium deficiency, but didn't have good photos of what I had. I came across this Canadian experiment to show photos of the common deficiencies, which adds to the attached ones I already had. If you have any others post them here (photos showing deficiency symptoms have been the hardest to find).
Post by Jack-of-all-biers on Oct 27, 2020 15:43:47 GMT 10
So here are some photos of what I saw that made me do a little research on deficiencies I ended up suspecting low pH and did some tests that showed the soil had reached a pH around 5. This is my fault, as I added Sulphur a couple of years ago to bring my 7.5 pH down to 6.5, but I appear to have miscalculated. I've now amended with some dolomite lime and will stop any urea additions for the rest of the season and keep an eye on it.
So what I thought was a deficiency was. Likely a calcium caused by too low pH. Note the Lime is not to add calcium, but only to balance out some of the acid I've caused.
Photos of chinook leaf was at eye level and made me look further (note the slight yellow tips)
One leaf bud above (note rounded edges and more yellowing edges)
Yeah it can be very confusing trying to identify deficiencies. Your probably on the money about the pH because if its too low, or too high it creates nutrient lock out where the plant cant take up the necessary nutrients even if they are there or plentiful. Good start is to get the pH correct and wait a couple of weeks. If there is still deficiencies then look at other possibilities.
55lt Keggle Home Brewer. 55lt Kegmenter pressure fermenter.