Growing Trouble-Free Cherry Tomatoes

comments (8) February 6th, 2009

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Green Grape, an heirloom tomato.
Currant tomatoes pack big flavor in a tiny package.
Sun Gold is delicious and prolific.
Green Grape, an heirloom tomato.Click To Enlarge

'Green Grape', an heirloom tomato.

Photo: Scott Phillips

Cherry tomatoes are easy-going fruits, which, if grown right, will yield basket after basket of flavorful harvests. They are less prone to many of the problems that plague larger-fruited varieties and they often produce fruit early.

My 96-year-old grandmother, Jinx, when asked the secret to her longevity, advises: “Never say can’t, try everything once, and make one new friend each year.” She should add growing cherry tomatoes to her litany. Other than walking the dog or taking a language class, I’ve found that the best way to increase my circle of friends is to grow cherry tomatoes. When they start ripening in late July, I place small baskets of these multicolored sweets around the office. Without fail, people I’ve never met before approach me to say how much they enjoyed a particular variety, and I invite them to visit my garden for more.

Wild cherry tomatoes are the grandmothers of most tomato varieties we enjoy today. Native to the South American Andes, they traveled north through Central America to Mexico, where they were domesticated and cultivated before the arrival of Columbus. In the 16th century, Spanish conquistadors returned from Mexico with the seeds of small-fruited tomatoes, as well as those of larger, irregularly lobed cultivars.

According to Andrew F. Smith, author of The Tomato in America, many European varieties were derived from crosses between these different forms. A related species, the tiny-fruited currant tomato (Lycopersicon pimpinellifolium) is native to the western coastal areas of Peru and Ecuador, where it grows as a sprawling weed.

Because of its resistance to diseases like fusarium and bacterial wilt, as well as its habit of producing fruit in long trusses, the currant tomato has been cross­bred with other tomatoes, producing many modern cherry tomato varieties.

Chose varieties for your region
At a market garden I worked for in Germany, we would sprinkle a few gold tomatoes in each box of Sweet 100s, just to highlight their glowing red color. Imagine what you could do with today’s  array of cherry tomato colors and shapes.

If you’ve never outgrown your desire to play with food, and if the thought of making mosaics with multicolored cherry tomatoes appeals to you, then you can choose yellow, orange, pink, or green, round, oval, pear-shaped, or pointed varieties. Since there are so many, I’ll concentrate on my favorites, their flavor, and their suitability for different climates—a deciding factor in areas with difficult growing conditions.

Sun Gold cherry tomatoes
  'Sun Gold' is sweet, fruity, prolific, and a strong grower, even in very hot zones.
‘Sun Gold’, an orange hybrid, has attracted a cult following because of its burst of warm, sweet flavor, reminiscent of tropical fruit. Most of the people who tried these fruits in my garden last year could not stop eating them, and decided to grow their own this season.  ‘Sun Gold’ has received good reviews from around the country, including states as hot as Alabama. Expect fruit early and often.

‘Sweet 100 Plus’ is another all-around great choice if you like your cherry tomatoes sweet. Extremely vigorous (so you’ll have to stake the vines), productive, and crack-resistant, it’s widely available and is a reliable standard hybrid, no matter where you live.

If, instead of sweetness, you prefer a more versatile tomato-ey flavor, grow ‘Camp Joy’. This variety, a favorite of organic gardening pioneer Alan Chadwick, is the most vigorous in my garden. The seeds of ‘Camp Joy’, an open-pollinated variety, are lovingly preserved on a farm of the same name near California’s central coast, where nights are cooled by ocean fog. ‘Camp Joy’ is also an excellent choice for drying.

‘Golden Nugget’ is another excellent choice where nights are cool. Developed in Oregon, this variety has tasty yellow fruit that does not require night temperatures above 55°F, as do most varieties. ‘Gold Nugget’ ripens fast and resists cracking. Determinate in habit and therefore compact, it is well suited to growing in containers.

Another group of devotees in my garden worships ‘Rose Quartz’. Its rosy-pink, extremely juicy, oval-shaped fruit hangs in abundant, grapelike clusters. Its only fault is its susceptibility to cracking in periods of alternating wet and dry weather. Mulching and even watering can ensure you a plentiful harvest.

‘Green Grape’ heirloom tomatoes are actually green and yellow when ripe (you can tell because they become softer and slip easily off the stem).Put them on your crudité platter to complete the mosaic of colors, or use them to make bright green salsa and ketchup.

Green Grape cherry tomatoes Currant tomatoes
  'Green Grape' is an heirloom with a bright flavor that's sweeter than its green skin implies.   Diminutive currant tomatoes grow in trusses of gold or red, with very little work on the part of the gardener.
Children (and most adults) can’t help falling in love with adorable pear-shaped tomatoes. ‘Red Pear’ is meaty and is a good choice for drying; ‘Yellow Pear’ tastes lighter and more ethereal, with lemony overtones.

Tiny currant tomatoes come in red, pink, and yellow. Their fruits tend to be seedy, but have a distinctive sweet-and-sour flavor. Seed savers should be aware that because of the shape of their flowers, currant tomatoes are more likely to cross-pollinate with other varieties, so seeds saved from nearby tomatoes might not come true. If you plan to save seeds, set the plants at least 50 feet from other varieties.

Another type of cherry tomato that has become more widely available in the last several years is oval-shaped. One such variety is ‘Santa F1’, a hybrid from China. You’ll find similar oval tomatoes sold at markets as grape tomatoes.

Give cherries full sun and regular watering
Growing cherry tomatoes is easier than growing many large-fruited tomatoes, primarily because cherries produce so many blossoms that there’s a good chance some will set fruit, even in less than ideal conditions. For healthy plants and prolific yields, give them what they like best: full sun (eight hours per day), fertile soil, and even moisture. If you buy nursery-grown plants, find the stockiest ones you can, without flowers or fruit. If only lanky plants are available, bury them sideways several inches deeper than they were in the pots. The plant will reach skyward, and more roots will develop along the buried stems.

Start cherry tomato seeds indoors on a warm surface six to eight weeks before the last expected frost date in your area. If it never freezes in your zone, start them six to eight weeks before night temperatures are consistently in the 50s. Use a fine seed-starting mix, and sow seeds 1⁄4 in. deep and 2 inches apart. Water so the soil is moist but not soggy, and keep the soil temperature between 70˚ and 90°F. A seed-starting mat that provides consistent bottom heat will provide the warmth the seeds need to germinate.

If you cover your flats with plastic, make sure air circulates in. If you see moisture forming underneath the plastic, take it off to prevent rotting. Proper air circulation is critical.

When you see the first signs of life—usually within a week or two—provide strong light. Most gardeners don’t have a full day of intense sunlight pouring in through their windows, especially in early spring, so I’d advise against setting your seedlings on the windowsill. Position a grow light 2 to 4 inches away from seedlings for up to 18 hours a day. This should prevent plants from getting leggy.

Loosen leggy seedlings...
If you let your seedlings get a little too leggy, here's how to remedy the situation: Use a pencil to loosen and carefully lift out the roots and plant. Remove the lowest leaves, and plant the seedling deep in the pot. Firm the soil and water well. Photos: Jodie Delohery.
  ...then repot
   
Once all the plants are up, high temperatures are no longer necessary or desirable, and 60° to 70°F days and 55°F nights are ideal. When the second set of leaves appears, it’s time to transplant. Loosen the roots with a pencil and transplant seedlings into 4-inch pots or deep flats. When night temperatures are in the 50s and all danger of frost is past, gradually acclimate your plants to the outdoors.

When they’re ready to live outside, prepare a garden bed by adding plenty of well-rotted manure and a source of phosphorus and calcium (such as bone meal). Set seedlings 2 to 3 feet apart in rich, well-drained soil, and water them in well.

Like regular tomatoes, cherries need a consistent supply of water. At the same time, cherry tomatoes often remain productive in very hot weather that causes the blossoms of larger-fruited varieties to drop off. How much you need to water depends not only on the amount of rainfall you receive, but also on your type of soil. If you have fast-draining soil, you’ll need to keep a close eye on your plants and water often if the weather’s been dry. Well-prepared clay will hold water for some time. Before watering, check the soil for dryness. If the foliage looks limp, you’ve waited too long to water.

Once the plants are established and about a foot tall, lay down mulch. I wait until the plants are this size because they are then better able to withstand damage by slugs or other insects that you might find under mulch. Either straw or compost makes a good mulch.

Indeterminate, or vining, cherry tomato varieties need strong supports. There are many possible methods. I like to prune the vines to two branches and wind them up strings supported by a wooden frame, for neat appearance, good air circulation, and easy access to the fruit. Caging requires the least work, however, and often produces an even greater yield. Use strong cages made from concrete reinforcing wire and stake them firmly into the ground; you’ll be glad later. Those flimsy inverted conical cages sold at garden centers bend and fall over under the weight of mature plants.

Fighting diseases and cracking
If tomato leaf diseases are a problem in your area, choose a variety described as resistant and vigorous. Rotate your crops, since many diseases survive for several years in the soil. Try not to plant tomatoes where other members of the night­shade family, such as peppers, potatoes, and eggplant, have been grown recently.

Watering the soil rather than the leaves, and mulching the ground with a material such as straw will keep the water from splashing onto the lower leaves and stems. This can help prevent diseases from spreading. Some gardeners even remove the lower leaves of tomato plants once they are well established to prevent them from picking up diseases from the ground. Red plastic mulch is said to keep nematode populations down. There are, however, diseases for which there are no resistant varieties.

I plant herbs like cilantro and dill near my tomatoes and let them go to flower. They attract beneficial insects that keep pests such as hornworms under control.

Cherry tomatoes are less prone to many of the cosmetic problems—blossom-end rot, catfacing, and sunscald—that plague larger-fruited types. Certain varieties are more prone to cracking than others, including most currant tomatoes, which often do better during hot, dry summers. I’ve never had problems with ‘Camp Joy’, ‘Sweet Million’, or ‘Gold Nugget’.

Cherry tomatoes are perfect container plants
All cherry tomatoes can be grown in containers. Use a 5-gallon pot with drainage holes at the bottom; I use plastic rather than terra-cotta because terra-cotta dries out so fast that you’ll be a slave to watering. Fill the pots with a planting mixture that drains well. Start and harden off the plants as directed above, and plant one tomato per pot in a sunny location protected from strong winds.

Rose Quartz grown in a container
  Rose Quartz' is high on the list of perfect tomatoes. ITs one fault is cracking, which can be prevented with even watering and mulching. Photo: Janet Jemmott.
Water and nutrients leach quickly out of container plants. Feed every two weeks and keep the soil evenly moist, but don’t let the pots sit in a saucer full of water. A good fertilizer to use on container tomatoes should have more phosphorus than nitrogen. Too much nitrogen can result in abundant leaves, and few fruits. Unless you are growing a very dwarf variety, provide a stake or cage to support the sprawling vines.

At harvest time, loose, ripe cherry tomatoes overflow into my hands, but plants often produce so much fruit that it’s hard to keep up with the picking. Now’s the time to start leaving baskets of fruit in strategic locations, or to recruit children to help pick. It’s amazing how many children who won’t touch larger varieties will eagerly reach for cherries.

At the market garden I worked for in Germany, everyone worked so quickly that I had to train myself to pick cherry tomatoes without eating them to keep up my speed. With peas, for which I still have absolutely no self-control, I fortunately got fast enough to be able to snack and pick at the same time.

Let's eat!
Although eating cherry tomatoes whole, directly off the vine, is the most common way to enjoy them, I like to reserve a supply for my brother, John, who is our family’s most artistic cook and has great ideas for using cherry tomatoes. At the height of the season, when you have an abundance of cherry tomatoes (something I’m sure you’ll achieve), try one of these recipes that John has created: Herbed Goat Cheese Tartlet with Currant Tomatoes and Cherry Tomato Sundae (yes, with ice cream!). They are wonderful for family events or parties with your new-found, cherry-tomato-loving friends.

Sources for cherry tomatoes
The Cooks Garden
PO Box C5030
Warminster, PA 18974
800-457-9703
www.cooksgarden.com

Nichols Garden Nursery
1190 Old Salem Road NE
Albany, OR 97321-4580
800-422-3985
www.nicholsgardennursery.com

Renee's Garden Seeds
6116 Highway 9
Felton, CA 95018
888-880-7228
www.reneesgarden.com

Tomato Growers Supply
PO Box 60015
Fort Myers, FL 33906
239-768-1119
www.tomatogrowers.com

by Alice Krinsky
August 1999
from issue #22


posted in: tomatoes

Comments (8)

MBest writes: I have cherry tomatoes in hanging baskets, it's August in Calgary. They have grown well with a lot of fruit for small plants. Should they be fully red before harvesting or should you remove the vine whole green?
Posted: 2:09 pm on August 14th
zechariah writes: i am a post graduate student working on cherry tomato,and i wanted to find out if you can help me with some useful literature on cherry tomato.thank you.
Posted: 7:09 am on July 14th
pendaflex writes: hello, people from vegetable gardener it´s Freddy back again(wilfredo). Hey friends I would like to know more about tomatoes not only cherry tomato but also other seeds I mean bigger tomatoes. It's very interesting the way you're illustrating people on how to grow tomatoes or any other kind of fruit. As you see tomatoes is the fruit that I like most. Forgive any error in using your language but this is a very good way to practice it. My regards to you
Posted: 9:07 pm on June 28th
petuniababi writes: This was informative and i could have used this three years ago when i first tried these little beauties.I had to learn by trial and error.But it was worth it.I have a plant on my patio right now that's loaded with the little sweeties.Everybody wants to sit on my patio this time of year so they can snack right off the bush.Growing them is very rewarding and delicious!!!!
Posted: 3:08 pm on June 22nd
SeymoreHaze writes: Very informative!Must try an grow my cherry tomatoes again.My first attempt was unsuccessful.1st time growing since 12yrz old
Posted: 4:24 pm on June 20th
lakelade1 writes: Last year I tried Sweet 100 for the first time, in a container, on the patio. I have had a lot of problems with leave disease in the past. The plant grew taller than my 6'5" husband and produced prolifically - and no leaf disease! I planted it again this year and already have tomatoes forming. We love this sweet little beauty.
Posted: 2:08 pm on June 14th
Ruth writes: Lobbydosser, welcome to the site. I'm no spring chicken either. With age comes patience and an appreciation for nature, and with luck, more time for long-term activities such as gardening. I traveled a little in Scotland many years ago, and I saw tomatoes being grown in greenhouses. If you have any photos, consider sharing them on this site. I'd be happy to help you post them if you encounter difficulties. You can email me at rdobsevage@taunton.com .
Posted: 9:14 am on May 29th
lobbydosser writes: Although I am in my 70's I have only been growing tomatoes and taken a real interest in gardening in the past few years.
Due to more time on my hands.
This article has been very informative to me and I have taken a lot from it.
I live just outside glasgow,scotland where we dont get a lot of realy warm sunshine but get a lot of rain so I use an 8x6 green house(glass).
regards
lobbydosser
Posted: 8:53 am on May 28th
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