[Jinny23]

Hi all,
I have put beetroot into the ground about 3 weeks ago and today I noticed Brown leaves going black.
I did sprinkle Tomato feed( a weak solution) on them a few days ago.
Any thoughts?
Am I going to lose them ?

[compostqueen]

Are they all like that?

[mikegm]

Sounds like the tomato feed may have been to blame..

[Gardener and Rabbit]

Leaf miners start as brown patches, and then the whole leaf eventually shrivels up - if it's these there's a tiny maggot feeding between the upper and lower surface of the leaf.