What are these dark spots? - Page 2

gorbelly · July 16, 2016

Other things can look like magnesium deficiency.

Also, magnesium deficiency in the plant doesn't necessarily mean deficiency in the soil. It could mean nutrients are out of balance (too much Ca, too much K, etc.) or that the pH of the soil is off and inhibiting absorption of nutrients. For instance, if you see a lot of nutrient deficiency signs around you in-ground plants, the soil in your area could be too alkaline or too acidic.

https://puyallup.wsu.edu/wp-content/...psom-salts.pdf

Merediana · July 17, 2016

I've just done some pH tests and everything is perfectly fine

When this season is over I'll probably get my soil tested to see what fertilizer is needed. Sadly this is quite expensive here

zipcode · July 17, 2016

You can also look for spider mites, sometimes it looks somewhat similar, although I'm inclined towards magnesium here. There are varieties of tomatoes less prone to this. Probably the best in this regard that I tried is Berkley tie die pink. As long as the problem is lower than currently ripening fruit it's fine really.

July 16, 2016	#16
gorbelly Tomatovillian™ Join Date: Jul 2015 Location: Southeastern Pennsylvania Posts: 1,069	Other things can look like magnesium deficiency. Also, magnesium deficiency in the plant doesn't necessarily mean deficiency in the soil. It could mean nutrients are out of balance (too much Ca, too much K, etc.) or that the pH of the soil is off and inhibiting absorption of nutrients. For instance, if you see a lot of nutrient deficiency signs around you in-ground plants, the soil in your area could be too alkaline or too acidic. https://puyallup.wsu.edu/wp-content/...psom-salts.pdf Last edited by gorbelly; July 16, 2016 at 06:50 PM.

July 17, 2016	#17
Merediana Tomatovillian™ Join Date: Feb 2016 Location: germany Posts: 190	I've just done some pH tests and everything is perfectly fine When this season is over I'll probably get my soil tested to see what fertilizer is needed. Sadly this is quite expensive here

July 17, 2016	#18
zipcode Tomatovillian™ Join Date: Jun 2010 Location: Romania/Germany , z 4-6 Posts: 1,582	You can also look for spider mites, sometimes it looks somewhat similar, although I'm inclined towards magnesium here. There are varieties of tomatoes less prone to this. Probably the best in this regard that I tried is Berkley tie die pink. As long as the problem is lower than currently ripening fruit it's fine really.