Greenhouse Tomato Pollination
- Paul Betz is High Mowing's Sales Manager and the owner of High Ledge Farm in Woodbury, VT.
We grew a fair amount of tomatoes for our markets, but like I have said many times in the past, our small plantings had to perform to the fullest to give us what we need to be profitable. We spent some extra time in the greenhouse to make sure that all the other work we did paid off.
Like Jacob mentioned in his tomato trellising blog post, trellising has lots of advantages, and in the greenhouse it’s a necessity. We grew grafted plants, and were running two leaders on each plant. We were constantly clipping, suckering, and pruning our plants, and we expected a lot from them.
Sometimes individual plants do odd things, or need some special attention. We tied a piece of flagging to the trellis of that plant, so whoever was working with it next knew to look with some extra attention. Another rule that we followed is that we did any clipping up of the plant before we removed suckers. If something broke, we had a spare leader that we could then train as a replacement. That’s another perfect place for some flagging tape.
A few years ago I was having trouble getting a good set of fruit on the plants. Let’s face it; a tomato plant with no tomatoes on it is about as useful as an ice cube tray on the counter. In the field, the wind and pollinators who visit the flowers do great job of setting the fruit. But there wasn't that kind of wind in my greenhouses. Our houses weren't really big enough to have bumble bees brought in. I had been shaking the trellis with mixed results, but was getting frustrated. At this point I went to using a hand pollinator.
It’s a minor pain. It took me about 8-10 minutes to pollinate a five row, 60’ long greenhouse, and I did it every day. But the results were pretty amazing. If you look at the numbers, it cost only a few dollars worth of time to ensure that all our hard work was paying off. Another way to look at it is that about one tomato a day pays for the pollination. Not a bad return on investment. It also forces you to spend that time in the greenhouse, looking at every plant every day. When there’s a problem, it’s great to catch it early, and this daily visit was a great tool.
My pollinator was pretty high tech - an electric toothbrush with a piece of wire taped to the end. Be sure to get the sonic kind, not the ones that spin the brush head. All you need is a few seconds to adequately vibrate the flower enough for the pollen to move within the flower. Touch the vibrating wire to point where the flower comes off the stem.
So now you have all these huge tomatoes because of the work you’ve done pollinating. There’s one more step to consider. A truss clip will hold up the extra weight of these fully pollinated tomatoes. They’re cheap, they only take a few seconds to install, and they avoid lots of heartache at the sight of a cluster lying on the ground.
All of these steps add up to more work, but the work makes sense when it actually improves yields. There are certainly times when it feels like one more thing to have to do, but I forced myself to do it.
I hope your season is bringing you everything you and your farm need.
Paul
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We are practicing in Saudi Arabia on >75hectares of glasshouse