Tomatoes Woes

Followed advice and planted 5 different varieties ...
Plants are in Grow bag in greenhouse, fed twice weekly with Tomorite and kept watered evenly.

4 out of 5 are going great guns, especially Shirley, Alisa Craig & Gardeners Delight

However I also planted 2 plants of Italian Style tomatoes ........... they start off fine, healthy looking green fruit. As they increase in size if you look close in picture you can seen some very small dots ... not sure if that is an issue or not.
http://i771.photobucket.com/albums/xx351/Tafflad/garden/start.jpg


However as they get larger the bottom starts to go mushy.

http://i771.photobucket.com/albums/xx351/Tafflad/garden/greenturns.jpg

Then by the time they turn red the end have rotted ...
http://i771.photobucket.com/albums/xx351/Tafflad/garden/endresult.jpg


Any clues what this is and how I treat ......... every tomato on both of these plants has gone this way.

 

Not sure if pic1 is related to the other 2 which appear to be Blossom End Rot in Tomatoes

http://apps.rhs.org.uk/advicesearch/Profile.aspx?pid=395

 

OK ... I have just been feeding tomorite and once a week seaweed extract .... I'll try some potash .... not sure if I can dissolve some in water or not.

 

Been feeding Tomorite twice a week and seaweed powder in with water once a week .. plain water on remaining 2 days.
The other plants are doing fine on this regime ... masses of fruit with no rot.

Interesting (but proof) all the other plants (8 of them) are in the extra big Tomorite grow bags ..... the Italian plum 'problem' plants are in standard bags.


I can happily add potash ... how much do you put per gall of water ? 30g ?

 

Water well, every day BUT NO FEED, only feed once a week at the correct dosage

(new gardener I learnt that on here in past three months and it works)

Jack McHammockashing

 

For what it's worth, on the back of the bottle of tomato feed (Tomorite by any other name) that I use, it says, '.... in growbags under glass, feed twice a week'.

I'd suggest that, as the only plants which seem to be affected are your Italian style ones (and it does look suspiciously like blossom end rot), they haven't been getting sufficient water - whilst the watering regime you've been using may have been fine for the Shirley, Alisa Craig & Gardeners Delight, the Italian ones - with their thicker, more dense, flesh - clearly need looking after slightly differently and I agree with Shiney, watering 2 or 3 times a day would be the way to go.

 

I have a similar experince I have Shirley Gardeners Delight and Jersy devil with pepper shaped fruits, the first two are fine but the odd shaped one has what looks like blossom end rot but all plants have had the same treatment as to water and feed, One more thing I train my plants on strings shirley and GD are agian fine Jersy Devil has produced bad scaring every where the string touch. and the flavour is not good

 

When u say italian tom's ,do u mean beefy type tomatoes ? I've found that the big italian toms benefit from being started off quite a bit later than the usual plethora of toms . They also make quite big boofy plants and need much more root depth . Big pots - as and when they r ready . Grow bags r much too shallow for them . Its taken me a couple of years to get the hang of the beefy types but i'm getting there ! : )