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12/07/2014 at 20:23

I was so looking forward to my first tomato tonight, it came off very easily but when I turned it over I noticed it was greeny brown underneath and soft, like it has gone rotten?  Can someone tell me what has happened.....what have I done wrong and will this happen to all my fruit?  Gutted Tracey


12/07/2014 at 20:27

OL - what are the leaves on the plant like?  Afraid that looks like blight to me  

Are your tomato plants in pots?  If so, I'd move that one as far away from the others as possible. 

12/07/2014 at 20:32

Hi Ol

Its blossom end rot

12/07/2014 at 20:34

Oh noooooooo 

Here are a couple of pics, the tomato came off the end of the bunch you can see. It is the plant I posted about a couple of weeks ago with the black bits on the lower leaves.  I have checked all the other fruits on all my plants and they are all firm, no soft bits and still all green.

 I was hoping that maybe it had just got wet or something 

12/07/2014 at 20:37

I'll google both of those after dinner.  I was going to cut the rotten bit and eat the rest......maybe not!!


12/07/2014 at 20:37
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Register Search the RHS     Search advice Blossom end rot

Dark blotches on the ends of aubergine, tomato and pepper are alarming, but do not mean the end of the crop. This is called blossom end rot and is caused by lack of calcium in the fruits. By making minor adjustments in watering you will usually be able to protect subsequent fruits from blossom end rot.

Quick facts Plants affected Tomatoes and related crops such as aubergines and peppers.
Main causes Lack of soil moisture
Timing Summer Jump to
12/07/2014 at 20:40

Thanks Buddyboy, I didn't see your post when I posted above and had just read that exact piece myself, I'm glad its not blight, or at least I hope it isn't.  See what Dove says about the pics.

12/07/2014 at 20:55

In my experience BER tends to be darker with sunken blemishes.   I hope Buddyboy is right.  

I'm worried that this is the plant that you had concerns about earlier ....


12/07/2014 at 20:58

Hi Ol

I get this from time to time and it has never affected my whole crop just some, and I cant see any evidence of blight on your leaves or stems

12/07/2014 at 20:59

Me too Dove, I will do some more research and see what happens, I have nowhere I can move it too as no room 

12/07/2014 at 21:21
If it's blight I would expect to see the stem of the plant going black, blight is a big problem on our allotments, so far this year we're clear but this is the time it strikes so if I was you I would check the whole plant carefully, if any of the stems have started to go black then I would put the plant straight into a plastic bag and bin it!
If its just the fruit then it could be BER. Fingers crossed its the latter. I have lost complete crops to blight, its a sickener.
12/07/2014 at 21:51

Well, as you can see from the picture above of the plant there are only a few black spots on the leaves which I believe is caused by a mineral deficiency.  The stem and side shoots are really healthy......been so fed up about it but I feel a bit more positive now 

12/07/2014 at 21:53

I'm no expert and I'm not sure but it does look like Blossom End Rot.  It was the first think I thought of when I saw the picture.

12/07/2014 at 21:57

Thank you everyone, I am going to water again in the morning and also feed them tomorrow.  I must admit, my compost is rubbish, it doesn't seem to be holding any moisture for any of my plants.....lesson learnt, next year I will have my own compost or buy better quality and not using growbags black buckets from Morrison's is the way to go, all my plants in black buckets are thriving 

12/07/2014 at 22:29

Ok, having read up on BER and blight - both early and late (I didn't realise there were two types) I am still undecided, mainly because I do have discoloured leaves but not discoloured stalks and I need to inspect the leave more closely in the morning.

So, although I hope that it is BER I'm not taking any chances and tomorrow will take preventative measures for blight. I am going to remove more leaves from the bottom and any discoloured leaves. Unfortunately I can't move the plant as I have nowhere to move it to unless I move the whole GH around and that may mean damaging plants.

I will do my best to not lose my plant and will update you later in the season....or sooner if it dies  Thanks everyone for your help, lots of support as always 

13/07/2014 at 06:05

Hi Ol

I could not get the UK version of all the diseases, in a condensed form, but here is the US version, of Tomato diseases



Tomato Fruit Spots on fruit 1 of 9

13/07/2014 at 08:16

Orchid Lady, it's not BER. BER produces a dark leathery patch on the fruit.

Looking at the second photo in your 20.34 post, you've got a sick plant. Signs of several fungal problems and probably nutrient deficiencies too. I'd pot it up into a bigger pot with good quality potting mix and isolate it from the healthy plants. I'd also lay off the watering.

13/07/2014 at 08:38

Hi Italophile

If you look at my post above, and expand it 1 to 9 on Tomato Diseases

A dark leathery patch on the tomato fruit is Early Blight

13/07/2014 at 10:04

You have two problems with that plant OL. One is blossom end rot. I find this is usually caused by erratic watering ( letting it dry and then getting wet and then drying out again)

The second is Phosphorus deficiency it manifests itself as purpling in the leaves, particularly the leaf veins (as in your pic). In severe cases the whole plant may take on a purple hue. Tomato roots growing in cold soil, either in the greenhouse or the field, take up phosphorus poorly. Deficient plants lose vigour and yield poorly.

I find Epsom salts in the compost when you start helps the plant absorb more nutrients especially if the compost is poor.



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