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Tomato cross pollinating?

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Tomato cross pollinating?

Post  karynne on 4/30/2015, 8:33 pm

Hi, I am planting 2 different types of tomatoes this year and am going to do 1 per square, one of the types is a new one and I don't want to mix them up at all, should I just plant them in 2 different locations?

thanks Very Happy

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Re: Tomato cross pollinating?

Post  littlesapphire on 4/30/2015, 8:54 pm

It's really up to you!  Honestly, I've never had a problem with tomatoes cross pollinating, because tomatoes are self fertile.  However, it is possible for them to cross if a bee gets involved.  I've seen folks on the forum bag the blossoms before it opens so no bees can get in there, and then once the fruit sets, they remove the bag and tag it so that when it's time to save the seeds, they know which one they isolated Smile   Hope that helps. 

Of course, you can separate them as well.  I hear tomatoes don't need a huge space between them like some crops do.

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Re: Tomato cross pollinating?

Post  yolos on 4/30/2015, 9:39 pm

I agree with what littlesaphire said IF you are trying to save seeds.  If you are not saving seeds, then they are fine right next to each other.

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Re: Tomato cross pollinating?

Post  Pollinator on 4/30/2015, 10:59 pm

The fruit is not adversely affected by cross pollination, actually there may be more vigor in the growth of the fruit.

Crossing is only of major importance if you plant to save seed, and want to keep the varieties pure. You can bag plants if you want to do that. But there is very little cross pollination with modern tomato varieties, whch are self fertile and the stigma (where the pollen is received) is deep within the corolla.

Look carefully at your flowers. On a few varieties (usually older ones like yellow pear), the stigma sticks out of the flower. These are much more likely to receive pollen brushed off from a bee. If you want pure seed of these, you'd have to only grow one variety, or bag the flowers.

On the majority of varieties, those with inverted stigmas, crossing generally runs less than 2%.

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