How to Grow Roma Tomatoes (in a pot) AND
Roma Classic OG, 2009 Growing Journal

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Disclaimer: The following How To is just one way to grow a roma tomato plant. There are many different methods, tips and do's and dont's on growing tomatoes. The following method is right for our climate zone, requirements, and situation. We hope that it will be helpful to readers. Also, tomatoes grown in containers larger than 5 gallons, (10 to 25 gallons) will produce more and larger fruit, but 5 gallon is what we have to work with this year. So,...

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Update June 28, 2009:

A lot has happened in the past 2 weeks and not much of it is good. First off, we are getting mid-July Summer heat in the middle of June, about a month early. And I mean scorching heat! For 2 weeks, there has been solid 95 to 105 degree heat, with a heat index (humidity factored in) of up to 109 degrees every single day. Only a few blooms have produced new tomatoes but tomato production has largely stopped altogether.

Blossom Rot As if that wasn't enough, there was also a blossom rot fiasco. For those of you that don't know, blossom rot looks like this: It occurs when the tomato fruit does not get enouch calcium from the soil. The ironic part is that the soil might actually contain enough calcium, but it goes to the tomatoe's branches and leaves first, but not the fruit. This blossom rot only occurred on 1 roma tomato, one of my youngest and one not pictured anywhere above. It also occured on 1 Spitze. Since that Spitze only produced one tomato before the heatwave hit, it's not a catastrophe. However, on the Roma that was struck by blossom rot, about 24 little tomatoes had to be pulled off.

What can you do when you have blossom rot? After you got it, not much. It's easier to prevent it from happening then it is to cure it. - See, when I mixed my little bit of peat moss with my compost and top soil to make my container mix, I incorrectly assumed the few crushed eggshells I tossed in carried enough calcium. Or maybe it did, and by chance that bucket didn't get enough eggshell calcium in the mixture, or it did and it just didn't get to the roots, or it was watered too much and washed out. - Either way, I take the blame. (BTW, blossom rot is not related to the heat wave unless I did water too much).

I'll tell you about my attempt to fix the problem, albeit late, but let's jump ahead to what you need to remember to do next year. As you are mixing the compost, peat moss and top soil together for your containers next year, throw in a cup or two of lime, or crushed eggshells, and mix it up real good with that soil.

To make this heat weave and blossom rot story short, here's how I fixed the problem: I bought a bag of lawn variety lime (high in calcium), and poured in about 4 to 6 ounces on the top of the soil for each bucket of all 30 of my different tomato plants. I then used a small tool to scratch this lime into the top one centimeter of the soil. I then added 2 to 4 more inches of top soil on top of the lime and old container soil. As I had written about before, the soil had become too compacted from the rain and watering. In some cases, the roots were already showing through the top and in every other case, they were in danger of coming out from the top. So, learn from my mistakes. After getting the soil levels built back up in all 30 buckets, I layed down a layer of quartz river rock to act as my mulch. This will do a great job of keeping the Sun off the soil, keep the water from evaporating as fast, and keep the temperature of the soil down below cooler. I chose rocks and pebbles because I wanted something heavy on top of the soil, and so it wouldn't get washed away. I also thought the white quartz rock would do a better job of reflecting the Sun then other types of mulch. I came across this moisture meter (or here) in a garden store and it has proven itself quite useful - better than sticking your finger down in the dirt to try and guestimate the moisture content. Although I am not one for gardening gadgets, I like the simplicity of this one and it's helpful on telling you when to water. If you remember from reading above, I calculated that the Summer heat by the 4th of July would force me to water my

- This reading clearly says Wet although the Roma plant was watered about 20 hours ago. The added soil and rocks are REALLY doing a good job. The soil temps taken after this photo was taken were 86 to 88 degrees.

5 gallon container tomatoes 2x per day. Well, that scorching heat wave came earlier than expected, hotter than expected and I had to move up my soil and rock mulch schedule. I wasn't sure how these white quartz river rocks would work, but they are doing much better than I expected. Looks like I might be watering once a day or less and not the 2x I expected.

Soil Temperatures: Feeling inspired, I used my wife's meat thermometer (with her permission) to take soil temperatures. At about a 5 inch depth, on 3 seperate plants, the soil temperature ranged from 86 to 88 degrees. Nice! :-) - Keep in mind, I watered 20 hours ago, and it is 100 degrees outside right now at 1500hrs. While the soil is a comfortable 88 degrees in 100 degree heat, the rocks are only lukewarm - not near as hot as I thought they would be.

Let's see some pictures...

This is the same close up of the 3 young roma tomatoes you saw earlier, but now they are about 2 weeks older. This one here is ripening faster than my Early Girl Tomatoes.

Same Roma Tomato plant seen further above under the June 15th update. This one has about 16 Roma Tomatoes on it so far... The other Roma of the same age has about the same.

Update: July 14, 2009

Not really much to report over the last 2.5 weeks. My introduction of lime into the soil and by making "lime tea" (cup of lime mixed with 1 gallon of water), has helped the blossom rot on most of my tomatoes except one young roma, but the tomatoes there are improving and the blossom rot is less severe. I will keep treating it as I have.

The Roma's are throwing out lots of fruit and we've collected about 20 so far among the 3 remaining good plants and we made plain roma tomato sauce with them which we documented and will make into a short video. (This sauce also included 4 early girl tomatoes that we didn't have anything else to do with, so we threw them in too).

The Roma's are not offering ripe tomatoes all at the same time, like determinate tomatoes are defined as doing, but I don't really care - just as long as I get tomatoes. I have to say that probably because they are container grown, the fruit I am getting are a lot smaller than normal. Probably in the one to two ounce range, and sometimes smaller. This roma classic breed isn't known for it's size either. Next year, for the 2010 growing journal, I will be attempting Rio Grande Roma tomatoes which are larger and known for the ability to endure the heat - a good choice for Oklahoma.

Continuing on, although small, the fruit are packed with delicious flavor and the sauce we made was just simply - incredible. With only a tablespoon of salt added to fresh, just made tomato sauce, the flavor exploded and was out of this world.

My wife said the smaller roma tomatoes that she ate as snacks were very delicious, but the skin was a little thick. Thick tomato skin, as my theory goes, is a product of the super heat we have as the skin on the tomatoes here must be thicker to retain the water and keep from cracking. ALL of my tomatoes grown here in the Tulsa area end up having thick skins.

Roma tomato plant. We've already picked about 6 to 8 good tomatoes off this plant which started ripening about 10 days ago. Thanks to the rock mulch added earlier, I am still only watering once a day. Have not fertilized, don't believe I will.

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