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FROM THE ARCHIVES: More From the Master Gardeners - Tomatoes 102.3

By Sommer Cartier.


Editor's note: Sommer Cartier is one of our regular SDHS newsletter columnists, writing Grow With Abundance for us bi-monthly and she is a writer for the Master Gardeners as well. This article is a mash-up of our From The Archives with the newest column in our retinue The Master Gardeners. Enjoy!


Click here to view an interview with MG Sommer Cartier on KCBS News from May 1, 2020

Spring is here! The season we await so we can enjoy the pleasure of biting into a plump, juicy, vine-ripened, homegrown tomato. As San Diegans, we live in perfect tomato climate—an ideal combination of sunlight, heat, and an extended warm season. This leads to easy tomato growing, even for the most challenged gardener. In fact, tomatoes thrive, and even excel, under stress. Even under less ideal conditions, they rise to the occasion and produce a beautiful crop of fruit ranging in color, shape, size, and flavor. You might even say that there’s something to admire about the determination of a tomato. With a few helpful hints, you can reach a whole new level of tomato cultivation and further enjoy the experience.

Before planting tomatoes, it’s important to select varieties that fit both the growing conditions in your yard and with your eating preferences. One thing to consider is the size of your garden. For small gardens or containers, plant determinate tomatoes. They’re bushy and have genetic characteristics that limit their growth to about three or four feet in height. I’ve had tremendous success with ‘Oregon Spring’ and ‘Celebrity’ tomatoes. If you are interested in growing heirloom tomatoes, consider using heirloom varieties that have been grafted onto disease resistant rootstock. These plants will give you the desirable traits of an heirloom plant along with the added benefit of being resistant to some common tomato diseases.

With larger spaces, you have the luxury of choosing determinate and/or indeterminate tomatoes. The beauty in planting indeterminate tomatoes is they will produce tomatoes over a longer period of time. You also have a larger selection to choose from since the majority of tomatoes fall under this category.

Next, consider how you plan to eat your tomatoes. Here are a few of my favorites:

(Note: ‘I’ = Indeterminate; ‘D’ = Determinate)

  • Cherry tomatoes for snacking or salads: ‘Sungold’ (I) and ‘Black Cherry’ (I) are both super hardy plants known for producing an abundance of small, sweet fruit.

  • Tomatoes for making sauces or canning: ‘San Marzano’ (I) or ‘Roma’ (D).

  • Slicing tomatoes: ‘Rutgers’ (I or D) and Black Krim (I) are sweet medium sized meaty tomatoes sweet.

  • Novelty tomatoes: ‘Green Zebra’ (I) has striped deep lime green fruit with a sweet tangy taste.

Once you have selected a tomato variety, it’s time to place it in the ground (or pot). When planting tomatoes, always plant deep. Remove all leaves from the lower two thirds of the stem and bury deep in the soil. The plant will send out new roots along the lower stem, providing a more extensive and robust root system.

If starting with small plants, remove all blossoms until they are established. This allows energy to go towards raising a strong healthy plant. Once the plant is growing well, let the flowering begin. Remember to fertilize once they start flowering. Make sure there are plenty of bees to pollinate the tomato blossoms. If you find there is a shortage of bees, invite them to your garden by providing water for them and planting borage, lavender, pineapple sage, and African blue basil.

Finally, remember to provide support for your tomatoes. For bushier determinate tomatoes, a tomato cage works fine. For the more tall and prolific indeterminate tomatoes, you will need a taller structure for tying up limbs; keeping them off the ground will reduce their susceptibility to diseases. A tall vertical trellis works great. With this type of support, you can create an espalier effect, allowing the plant to spread out and benefit from adequate airflow.

These techniques will increase your harvest, and having more tomatoes means more opportunities for summer dinner parties and sharing with friends and neighbors. And remember, a healthy garden is a harvested garden! For additional information, please see UC ANR Publication #88159 Growing Tomatoes in the Home Garden at

Portions of this article were previously published in the San Diego Horticultural Society publication, Let's Talk Plants! in July of 2017. Read the original article here.

And for more on tomatoes from Sommer, this time on blossom end rot, there is this article from May 2019.


Sommer Cartier

Sommer Cartier is a certified Master Gardener with an MA in International Development and Social Change. Her specialty is working with local food systems and using gardens as a tool for community engagement.


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