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Maximizing Tomato Yield

August 25, 2009

I had an interesting conversation the other day with the folks who are responsible of the Dartmouth Square Project and  Edenbee about our upcoming talks at Electric Picnic. During the conversation their resident gardening authority  offered a couple of tips to help put my tomatoes on the fasttrack to ripeness.

Cherry Tomatoes Ripening

I followed up our conversation with a google to verify the claims. It seems there are two things required for the tomatoes to ripen:

1. The tomato fruit need access to light and so can’t be in shade.
2.  The tomato plant needs to divert as much energy as possible to fruit production.

Luckily these two things can be accomodated easily by pruning branches, leaves and any fruits or flowers which are too dead or small to make it at this stage. Removing leaves reduce the amount of shade the fruit are in and also reduces the amount of effort the plants puts into leaf production and maintenance.

Admittedly, I should have been on this way earlier. As my grandmother would have said – I should have kept the amount of main stalks to 1 per plant (the Internet seems to think 2 is ok too) and remove any “suckers“. I haven’t been doing this. This is due to one part oversight on my part (read: laziness) and one part the difficulty in navigating around a microgreenhouse which is jam-packed with growth.

I removed as much of the plant as I could without disturbing the growth. Hopefully we will see some more ripe fruit beyond the 6 red tomatoes we have had so far. The plants outside are doing great – it certainly looks like bringing them out of the greenhouse was a good move!

The overgrown greenhouse, which as I’m sure you can imagine is difficult to get at to prune:

Overgrown Greenhouse

Below are our cherry tomato plants, post-pruning. Admittedly, you can’t see much difference to how they looked before. Rest assured that much was removed and it took a good while!

Cherry Tomatoes Post-thinning

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3 Responses

  1. Make sure they don’t get too much sunlight or you will get sunscald and they will be inedible. Pruning suckers is a matter of choice, some gardeners do, some don’t, and no one seems to think it really makes a difference either way unless they are fanatical. All the best with the potted tomatoes! I am sure with time they will ripen just fine.

  2. In Ireland I would say that there is no such thing as too much sun light! :)

    Interesting post. Are you suggesting that tomatos that are still only at the flower stage are too late and wont develop into fruit at this point? Or are you only pruning leaf still?
    I still have a pile of yellow flowers on some plants and am praying for that “indian summer”…

    Is the cherry tomato determinate? I didn’t think it was necessary to prune determinates.

    Re. 1 vine or 2 or let the suckers grow? I vote 2.

  3. I have to agree with John – too much sunlight isn’t something we have to worry about here in Ireland, particularly when the balcony only get direct sunlight until 2ish each day.

    The cherry tomatoes are determinate, you are right. I have to confess I didn’t think that would have had a bearing on our decision to prune.

    I have left some flowers on the larger plants but my intuition tells me that may be very wishful thinking at this stage with the light we get. Earlier in the summer, someone suggested surrounding the plants in the greenhouse with a reflective surface (tinfoil on cardboard) to maximize the light. I’m sorry I haven’t tried that now!

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