Lemon tree leaves

What is wrong with lemon tree leaves,

 

Needs a good feed, try ericaceous feed.
I assume you are referring to yellow leaves.

 

Ok, will try, thanks, the leaves are sometimes yellow in the veins

 

Do you mean between the veins?
That is usually suggested to be a shortage of magnesium.
But a good feed containing trace elements should help fix that, it wont be a quick fix though as I find once leaves go yellow it can take a couple of months before they start to green up again.

You could try watering with some epsom salts, but not always easy to judge how much you need.
It doesn't look drastic so I would just feed at every watering.

 

You could try seaweed extract.
It's not a complete plant feed, but its value lies in the huge range of micronutrients and minerals it contains, including iron and magnesium plus a wealth of others.
Monty Don uses only seaweed extract for all his citrus.

 

Thanks all, will take Monty Don method

 

It's worth keeping an eye out for spider mites (usually the two-spot spider mite) in the summer when it's hot and dry. It's not the tiny red spiders you may see whizzing around in summer.
If your plant is a bit stressed they may arrive and take advantage of that.
Signs are -
a peppering of tiny spots on the leaf tops then later tiny webs appear at the top of branches.
A magnifier is needed to see them as they are minute and almost transparent, but they're visible on the backs of the leaves along the veins with magnification.

 

Ok thankyou

 

Looking on my laptop now those leaves do look slightly speckled, depending on where its been kept overwinter it could have RSM on the under sides of the leaf.

 

It was kept in a cool conservatory over winter, will look tomorrow for RSM, Thankyou.

 

It wouldn't be the Red Spider Mites -it's most likely the 2 spot mites.

 

I’ve sprayed it with diluted fairy liquid, any good

 

The first thing to ascertain is if it has got spider mites.
Fairy liquid is not going to help if it's spider mites.

It's not a problem I've had, but from what I've read, neem oil is quite effective.
It's not toxic, but works by glueing the mites in place so they can't respire or move. Then they die. A few applications may be needed as eggs already laid will still hatch.

Ordinary bug spray don't work either as the mites are closely related to spiders and bug sprays don't kill spiders.

 

Thanks, I can’t see spider mites although some of the leaves feel a bit sticky, will give it a good seaweed feed (Monty Don!!).

 

This looks like an ant

from what you just said "sticky" I would be looking for aphids