It isn't something just seen in Black Krim. Catfacing and fused blooms are primarily weather related, weather at the time of pollination. Often seen in many of the large-fruited varieties if exposed to a dose of cool temps at pollination (in your case likely those 10 C/50 F days). Agree with Linda on removing fused blooms but many choose to leave them to see what develops. Yours are impressive. :)

Dave

Are you sure you've got BK ?
The pattern on the green fruit, with stripe , makes me doubt.

Seysonn

Seysonn, I got this from an eBay tomato seeds seller. the normal one grows this way.

Does not look like BK to me...

Have to agree that - this last photo -is not Black Krim. http://loghouseplants.com/plants/wp-content/uploads/2012/04/Black-Krim-label.jpg

Yeah, the fruit shape also is not like what BK looks like.
But OTOH, it looks very good. Even better than BK, to me.

Seysonn

UPDATE:
I was Googling. I saw images of tomatoes like yours.
One was at Tomatofest. They call it "Black Heirloom - Russian" tomato.
Another place call it just "Black Krim". It seems that there is more than one strain of BK.

I agree. I have grown Black Krim for the last 6 years and that is not what is generally accepted as Black Krim. Buyer beware on E-bay as there is no guarantee that you are getting what they say you are getting. If you like it then that's great, but it is not Black Krim.

Thanks all of your comments and photos attached.

The tomato share flat and big shape, and not that round. Need to buy from a trust-worthy tomato seller next time :P

For harvest, should I wait it is in more purple-red color, and those green shoulder part also turn into dark red? Thanks a lot.

Matthew

For harvest, you can ALWAYS pick after you see some color and let is sit on the counter until you get full color.. This method has advantages as preventing spoilage to critters, cracking... After color break, fruits ripen on their own, and do not receive any thing from the mother plant. It is just internal bio-chemistry.

When to slice ? It depends on variety. The best way is just doing it and find out HOW and WHEN you like the texture.

Seysonn

mmm- Since the consensus is that it's not a BK, to me it looks like the
one in your last photo is about ready to be picked.

Rodney

Seysonn, Your advice is very useful to prevent cracking.

Rodney, the fruit already picked and i love its farvor :)

My black krim are growing wierd too.