I've weeded a patch in my garden about 3 weeks ago with Roundup which has destroyed everything except what is shown below and there is plenty of it can anyone tell me what it is and how to get rid of it.
Could be anything as that is still baby leaves. It might, might, be Bittercress.
If you want rid, you can either hoe the lot on a dry day so they are chopped off from their roots and die or just do another application of a glyphosate based weed killer. You can expect seeds to germinate in the right conditions so may need to hoe again before it's all clear.
Look like annual seedlings that have germinated in an empty space. Its quicker to give them a quick hoe off rather than fill the sprayer bottle.
Thanks for your help, I will try both just to be sure.