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Warm Season Vegetables Start Early

Tomatoes are the favorite summer vegetable.

Warm season annuals that are becoming more available in nurseries are a clue. As they become seasonal, so do warm season vegetables, or summer vegetables. After all, they also perform as annuals within their respective seasons. It may still be too cool for many to inhabit the garden directly. However, several that grow from seed can start about now.

Many more varieties of warm season vegetables are available from seed than as plants. Vegetable plants are available in cell packs or four inch pots. They occupy more nursery space than racks of many more varieties of seed. Many more varieties are available from online catalogs. Several true to type varieties can provide seed for subsequent seasons.

Furthermore, many warm season vegetables grow better from seed than from transplant. Corn, beans, squash and root vegetables grow very efficiently from seed. However, they do not recover so easily from transplanting. Root vegetables are particularly susceptible to deformity from such handling. Seed for many root vegetables is ready for sowing now.

Seed is also an advantage for warm season vegetables that grow from many plants. For example, one packet of beet seed can provide more than enough beets. One cell pack of beets costs about as much, but provides only six possibly wimpy beets. A solitary tomato plant might provide plenty of tomatoes, though. Besides, tomato plants transplant easily.

Seed for corn, beans and squash should wait for warmer weather for their direct sowing. So should seed for many warm season vegetables that do not really need direct sowing. However, those that do not require direct sowing can start now inside or in greenhouses. They are easy to transplant from flats, cell packs or small pots later with warmer weather.

The season for warm season vegetables is only now beginning. Ideally, such vegetables arrive as cool season vegetables relinquish their space. Successive phases can replace the last of cool season vegetables. Eventually, cool season vegetables will reclaim their garden space. Currently new warm season vegetables should be finished with it by then.

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Celery

Celery season conforms to local climate.

It could be either a warm season vegetable or a cool season vegetable. Celery, Apium graveolens variety dulce, dislikes both frost and arid heat. It is a warm season vegetable where summer is mild but winter is not. It is a cool season vegetable where winter is mild but summer is not. Where winter is cold and summer is hot, it prefers spring and autumn.

Celery is a biennial, which grows vegetatively for its first year, and blooms for its second. Because it is ready for harvest in less than half a year, bloom is not a concern. Any that mature enough to bloom are too tough to eat. Celery appreciates organically rich soil. It needs regular watering. Growth is irregular if its soil becomes too dry, even temporarily.

Celery naturally grows as densely vertical foliar rosettes, or bunches. Its distended and elongated petioles are its primary edible parts. Its disproportionately small leaflets are also edible though. Mature celery grows about a foot and a half to two feet tall. It grows well from cell packs if only a few bunches are necessary. It also grows well from seed.

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Vegetables Change With The Seasons

Zucchini seed can be sown now.

Annuals are not all that change with the seasons. Vegetables do also. After all, with few exceptions, vegetable plants are also annuals, or perform as such. Most of those that are biennials are edible only during their first year. They bloom and become inedible if they survive for a second year. Most perennial vegetables are easier to replace than recycle.

As with annuals, it seems to be a bit too early to replace cool season vegetables. Some continue to produce, and may do so for a while. The weather still seems to be a bit too cool for warm season or summer vegetables. Technically, it actually is too cool for some. However, some must grow from seed. The weather will be warmer by the time they do.

Most cool season vegetables are actually vegetables. In other words, their edible parts are vegetative rather than fruit. Conversely, most warm season vegetables are actually fruit. In other words, they contain seeds. Tomato, chili, eggplant, cucumber, squash, corn, okra and bean are familiar examples. Some but not all continue to produce until autumn.

For example, zucchini and other summer squash produce until frost. So do pole bean, some cucumbers and indeterminate tomatoes. However, winter squash only grow during summer to ripen all at once for autumn. Okra, eggplant and various chilis should produce throughout summer, but likely will not. Secondary phases can prolong their production.

Determinate tomatoes, bush beans, and corn benefit most from phasing. They produce all their fruit within a brief season and then produce no more. Subsequent phases should start before preceding phases finish. Some can eventually replace lingering cool season vegetables. With good soil, fresh new tomato plants can start below aging tomato plants.

Seed for corn, beans, root vegetables and greens prefers direct sowing into their garden. Seedlings are stressed by transplant, and too many are needed. Cucumber and squash grow as well from seedling as seed, and a few should suffice. Tomato, chili and eggplant prefer to grow from a few seedlings a bit later. Some varieties are available only as seed, though. Such seed should be sown by about now, directly or within cells, outside or in.

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Sustainable Vegetable Gardening

It will be time to add warm season vegetables to the garden soon.

This article is recycled from several years ago, so the information about the class is no longer relevant.

            Just as we are getting accustomed to winter, it is already time to begin to get ready for spring. The first of the six sessions of the Sustainable Vegetable Gardening class with Master Gardener Ann Northrup at Guadalupe River Park and Gardens will be from 7:00 to 9:00 p.m. on February 10. Subsequent sessions continue weekly at the same time until the sixth session on March 17, in time for warm season vegetables to replace cool season vegetables.  

            Topics include: soil preparation, amendments and fertilizers; irrigation methods and systems; working with both seeds and seedlings; cultural requirements of specific warm and cool season crops and varieties that do well locally; and how to identify and manage common pests, weeds and diseases of vegetable crops in the Santa Clara Valley. Sustainable Vegetable Gardening emphasizes sustainable gardening techniques, such as mulching, efficient watering techniques, composting, integrated pest management and organic fertilizers and soil amendments. Participants will learn how to manage a successful and environmentally responsible food garden that will produce vegetables and herbs throughout the year.  

            Sustainable Vegetable Gardening will be at the Guadalupe River Park and Gardens Visitor and Education Center at 438 Coleman Avenue in San Jose. Admission is $72. Pre-registration is required and can be arranged by telephoning 298 7657. More information about this and other classes can be found at www.grpg.org.  

            Another reminder of the distant but eventual spring is that seed catalogues start to arrive. Some arrive by email as links to online catalogues. It seems that the best still arrive by mail though. I have yet to receive two of my favorite catalogues from Baker Creek Heirloom Seed and Park Seed. Baker Creek not only has some of the oldest heirloom seeds, including Early American seeds, but also some of the weirdest vegetable, herb and flower seeds from all over the world. Park Seed supplies the more contemporary traditional seeds that I grew up with, as well as all sorts of bulbs and plants.

            It may be too late by the time their catalogues arrive, because the Renee’s Garden Seed Catalogue is already here! The online catalogue can be found at www.reneesgarden.com. Even though I typically do not like mixed seeds, I do like Renee’s Garden color coded mixes with the different types within the mixes dyed different colors. I simply separate the different seeds as I plant them. It is like getting two or three packets of seed in one.

            I think I like Renee’s flowers as much as the vegetables. There is an entire page of sweet peas to choose from! I also like the selection of sunflowers, nasturtiums and morning glories. This last year, the delicate blue stars in the centers of the big white flowers of ‘Glacier Star’ morning glory were my favorite.

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Cool Season Vegetables Will Hopefully Do Better Than Warm Season Vegetables Did

Tomatoes were adequate, and perhaps quite good, but not as vigorous as they should have been.

Now that it is half way through September, it is impossible to ignore that tomatoes did not have a good season. Most of us who grow tomatoes were embarrassed by their performance until we realized that everyone else who grows them was also experiencing similar disappointing results. It was not because we did not water them properly. Nor was it because they lacked particular nutrients. They simply wanted warmer weather.

Plants that were put out early before the warm weather last spring did much better at first, but then decelerated as the weather became milder instead of warmer. Cool nights certainly did not help. Mildew, which typically slows a bit as weather becomes drier (less humid) though summer, instead continued to proliferate so that new foliage became infected almost as soon as it developed.

Earlier predictions that the weather would eventually get warm were not accurate enough for many of us who are only now getting enough tomatoes for fresh use, but not an abundance for canning, drying or freezing. There is still some time for most of the tomatoes that are on the vines now to ripen; but many will probably remain green by autumn. Some but not all of the last green tomatoes can ripen off the vine. Perhaps the only good news about all this is that there should be plenty of green tomatoes for pickling.

Sadly, tomatoes were not the only warm season vegetables to be dissatisfied with the weather. Green bean vines and bushes were generally healthy and made good beans, but did not produce very abundantly. Corn was likewise of adequate quality, but on smaller ears and less abundant. Even zucchini, which typically produces too much, was a bit subdued. Marginal vegetables that really prefer warmth, like eggplant and bell pepper, were downright disappointing.

Even if the weather gets warmer in the last days of summer, languishing tomato plants can not ketchup on production. They can be left to make a few more tomatoes, but will eventually need to get out of the way of cool season vegetables. Cabbage, kale, turnip greens, beets, radishes and all the slower growing vegetables that take their time through autumn, winter and early spring will want their space back soon. They will hopefully have a better season.

If possible, cabbage, broccoli, cauliflower and some of the larger cool season vegetable plants can be plugged in amongst the finishing warm season vegetable plants. Then, by the time the finishing warm season vegetable plants need to be removed, the next phase of cool season vegetable plants is already somewhat rooted and has a head start. This process works well in small spaces with good quality soil.

The main problem with this procedure is that it prevents potentially depleted soil from getting amended and well mixed between planting. It can also be a bit awkward to get the spacing of rows, furrows or mounds of the next phase of vegetable plants to match up with the previous phase. Smaller vegetable plants that get sown directly from seed into rows, like turnip greens, carrots, beets and radishes, really prefer customized bed preparation, after the warm season vegetables have been removed.

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Jalapeno Pepper

Jalapeno peppers are harvested before ripening.

Pecan is the State Tree of Texas. Bluebonnet is the State Flower of Texas. Less natively, jalapeno pepper, Capsicum annuum, is the State Pepper of Texas. It is naturalized there from Central and South America. Jalapeno pepper is merely one of countless varieties of the species though. Furthermore, it comprises several and various culinary subvarieties.

Jalapeno pepper typically grows as a warm season annual vegetable. It has potential to be perennial. Overwintering is likely more work than annual replacement though. Mature plants can grow almost three feet tall. They may produce nearly two dozen fruits through summer. They crave sunny and warm exposure, rather rich soil, and consistent watering.

Mature fruits, or jalapeno chile peppers, are firm and crisp. They should be between two and four inches long, and as wide as an inch and a half. Their smooth and glossy skin is deep green, but can ripen to red, orange or rarely yellow. Red fruit is preferable for some culinary application. Jalapeno pepper may be the most familiar of the ‘hot’ chile peppers.

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Sweet Corn

Corn takes space, water and diligence.

Almost all corn that grows in home gardens is sweet corn (Zea mays convar. saccharata var. rugosa). It is among the most popular of the warm season vegetable plants. Popcorn remains uncommon for home gardening. Other types of corn are mostly grains and other agricultural commodities that are rare within home gardens. Some corn becomes biofuel.

Corn stalks can grow as high as twelve feet! Most popular varieties grow only about half as high. Each stalk should produce one or perhaps two ears of corn. Each ear produces many kernels of corn in very neat formation on a central cob, all within a tight foliar husk. Male blooms protrude from the tops of stalks like antennae. Foliage is coarse but grassy. Stalks resemble giant reed, except smaller.

Of the various warm season vegetable plants, corn is one of the more consumptive sorts. It occupies significant area. It requires methodical and generous irrigation. Also, it craves rich soil, but depletes nutrients. Corn grows best from seed sown directly into the garden. Squared orientation, rather than typical rows, improves pollination and ear development.

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Warm Season Vegetable Plants Begin

Tomato seed should already be sown.

Warm season vegetables, or summer vegetables, can occupy a garden systematically. A few lingering cool season vegetables may continue production for a while. Warm season vegetable plants can replace them as they finish. Several warm season vegetable plants should start as early as possible. Others grow in a few later phases through their season.

For example, indeterminate tomato plants are productive throughout their entire season. They can start as soon as convenient. However, determinate tomato plants produce only for two weeks or so. After their initial phase of a single plant or a few, subsequent phases can start about every two weeks. Each phase continues production after its predecessor.

Bush bean and several varieties of eggplant and pepper also produce for brief seasons. Okra and cucumber might produce for most of summer. Secondary phases may increase their production as well though. Of all warm season vegetable plants, corn benefits most from phasing. Each phase tends to mature so uniformly that it finishes within a few days.

Pole bean, squash, some cucumber and Indeterminate tomatoes need no phasing. Such warm season vegetable plants perform from spring planting until frost. Winter squash are warm season vegetable plants, but their fruit finishes for autumn. Indeterminate tomatoes are less profuse than determinate types. Cumulatively though, they are more productive.

It will soon be time to sow seed for corn, beans, root vegetables and most greens directly into garden soil. Seedlings for these warm season vegetable plants are not conducive to transplant. Besides, too many are needed. Cucumber and squash grow either from seed or small nursery seedlings. Only a few plants are needed, and they transplant efficiently.

For the same reasons, tomato, pepper and eggplant can grow from seedlings rather than seed. Moreover, since they are so vulnerable as they germinate and begin to grow, seed is less practical than seedlings. Varieties that are unavailable at nurseries can grow from seed in flats inside or in a greenhouse. Ideally, they should have started early enough for transplant into a garden during appropriate weather.

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Tomato

Tomato champions the warm season vegetables.

Like most warm season vegetables, tomatoes, Solanum lycopersicum, are actually seed bearing fruit. They are both the most diverse and the most popular home grown produce. Grape tomatoes are smaller than little grapes. ‘Beefsteak’ can get wider than five inches. Although mostly red, some are yellow, orange, pink, green, brown, purple or pallid white. 

The most popular varieties of tomato for home gardens are indeterminate. They produce fruit sporadically throughout the season, on irregularly sprawling stems. Tomato cages or stakes support their growth. Shrubbier determinate varieties seem to be more productive only because all of their fruit develops within a brief season. They work well for canning.

Small tomato plants in cell packs and four inch pots, which are available from nurseries, should grow efficiently in the garden as the weather warms through spring. Varieties that are unavailable as small plants can grow from seed in cold frames through late winter, to be ready for the garden after last frost. Directly sown seed can be vulnerable to mollusks.

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Warm Season Vegetables For Spring

Frequent harvesting promotes continual zucchini production.

Warm season annuals for next spring and summer are already replacing the cool season annuals that bloomed so dutifully since last autumn. As this happens, it is also getting to be about time for warm season vegetables to replace cool season vegetables. Strangely continuous warm daytime weather since December accelerated this process somewhat.

Removal of cool season vegetables that are still productive is as unpleasant as removal of cool season annuals that are still blooming. Fortunately, most cool season vegetables are finished by now, or will be soon. Few linger into warm weather as some cool season annuals might. Regardless, warm season vegetables will need their garden space soon. 

Unlike most cool season vegetables, which actually are vegetative, the majority of warm season vegetables are actually fruits. The plants that produce them generally continue to bloom and produce more fruits throughout their respective seasons. Some, such as bush bean and determinate tomato, exhibit brief seasons. Many produce continually until frost. 

Therefore, indeterminate tomato, pole bean, squash, cucumber, many varieties of pepper and some varieties of eggplant need no replacement within the same season. Cucumber can get tired enough by early summer to justify replacement in midsummer though. Okra, as well as several varieties of eggplant and pepper, produce for relatively brief seasons.

Phasing prolongs production of warm season vegetables that produce only once or only for a brief season. For example, corn that matures so uniformly that it is ready for harvest simultaneously lasts only a few weeks in a garden. Phases for seeding that repeat every two weeks or so develop in two week cycles. As the first phase finishes, the next begins. 

Because so many individual plants are desired, and the seedlings do not transplant well, corn seed prefers direct sowing into the garden. So does seed for bean, root vegetables, and most greens. For tomato, pepper and eggplant, and perhaps cucumber and squash, small plants transplant well, and are not numerous enough in a garden to be expensive. Warm season vegetables grow slowly during cool weather, but accelerate as the weather warms.