蜜桃恋人

How to Grow Celery: The Complete Guide

Photo Credit
Alfredo Maiquez/Shutterstock
Botanical Name
Apium graveolens
Plant Type
Vegetable
Sun Exposure
Full Sun
Part Sun
Soil pH
Neutral

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Planting, Growing, and Harvesting Celery

Catherine Boeckmann

Grow your own celery, and you could be harvesting delectable stems from summer right through until the first frost. Garden-grown celery is much more tender and flavorful than the commercial types and less chemically laden. Learn more about how to plant, grow, and harvest celery plants.

About Celery

Celery needs a long, relatively cool growing season to grow nice and tall 12- to 18-inch stalks, requiring up to 140 days to come to harvest; however, some short-season varieties are available. In cooler regions, it does best planted in the early spring. In warmer areas, plan to plant in mid- to later summer.

Although celery has a reputation for being fussy to grow at home, celery always has a place in our gardens because it’s so useful in the kitchen鈥攆or stews, stir-fries, soups, and salads. Celery is considered a hardy biennial, but it’s typically grown as an annual. It’s best to start celery from seed indoors (transplants are hard to find and do not always succeed), and the plant is prone to bolting in cold weather, so it requires a little extra care, but you can succeed armed with this knowledge!

There are two main types of celery available:

  1. Trenching celery needs soil mounded up against the stems as they grow to produce crisp, pale stems. To make this easier, trenching celery is typically planted into trenches, hence the name, but some gardeners aid this blanching process using cardboard tubes, pipes, or collars.
  2. Self-blanching celery requires none of these extra steps. This makes it much easier to grow, and the stems are just as tasty!

Enjoy our video all about growing celery, and then follow the planting, growing, and harvesting instructions below.

Read Next

Planting

Select a planting site that receives full sun (at least 6 to 8 hours of direct sunlight per day). Celery needs nutrient-rich soil. Loosen the soil to a depth of 12 to 15 inches with a garden fork or tiller, then mix 2 to 4 inches of aged manure and/or compost into the soil, or work in some 5-10-10 fertilizer. Celery prefers soil with a pH between 5.8 and 6.8. Get a soil test if you’re not sure of your soil pH.

It’s important for celery to grow in moisture-retentive soil that doesn’t drain too quickly. Wild celery grows in boggy ground, so you鈥檒l need to ensure consistent moisture for this thirsty vegetable, while a sunny spot should ensure good, even growth.

When to Plant Celery

  • Due to its need for a long growing season, it’s best to start celery seed indoors. 
    • For a spring crop, start seeds 10 to 12 weeks before your last spring frost date.
    • For a fall crop, start seeds in time to transplant seedlings 10 to 12 weeks before the first fall frost date.

How to Plant Celery

Starting Seeds

  • Before sowing, soak seeds in warm water overnight. This will speed germination. The seeds are tiny, so handle them with care and a keen eye!
  • Fill seed flats or pots with good-quality seed starting mix, then gently firm it level.
  • Press soaked seeds into seed-starting soil; to get good germination, do not cover with soil. The easiest way to sow the seeds is to carefully tap the packet above the surface of the potting mix and watch carefully as the seeds fall. Ideally, you want them to fall about an inch apart. Once you鈥檙e done, firm the seeds into place.
  • Cover starter trays/pots with plastic wrap to retain moisture. Germination should occur in about a week, but it can take up to three weeks; be patient.
  • Soon after seedlings appear, place a fluorescent grow light 3 inches above them for 16 hours a day (plants need dark hours, too).
  • Maintain an ambient temperature of 70掳 to 75掳F (21掳 to 24掳C) during the day and 60掳 to 65掳F (15掳 to 18掳C) at night. 
  • Mist regularly.
  • When seedlings are 2 inches tall, transplant them to individual peat pots or to deeper flats with new potting soil. In flats, set the plants at least 2 inches apart.
  • Harden off seedlings before transplanting by reducing water slightly and putting them outdoors (in a sheltered spot protected from the sun) for a couple of hours each day.

Transplanting Outdoors

  • Plant celery outdoors when the soil temperature reaches at least 50掳F (10掳C) and nighttime temperatures don’t dip down below 40掳F (4掳C). (Cold weather after planting can cause bolting.)
  • Plant seedlings 8 to 10 inches apart.
  • Water thoroughly. 

Growing

To grow well, celery has three critical needs:

  1. Cool weather; celery won鈥檛 tolerate high temperatures.
  2. Constant water; stalks will be small, stringy, tough, and/or hollow if it goes without water.
  3. Soil that鈥檚 rich in organic matter and鈥攂ecause its roots are shallow (just a few inches deep)鈥攆ertilizer applied on top of the soil.
  • Make sure to provide plenty of water during the entire growing season, especially during hot, dry weather.
  • Use row covers for the first 4 to 5 weeks in order to protect from pests.
  • When plants are 6 inches tall, mulch around them to keep the soil moist and roots cool.
  • Side-dress with compost. Comfrey pellets are great, as are coffee grounds, tickled into the soil between plants. 
  • In the second and third months of growth, side-dress with 1 tablespoon of a 5-10-10 fertilizer 3 to 4 inches from each plant.
  • Keep celery weed-free, but be careful when weeding, as celery has shallow roots that could easily get disturbed.
  • Tie growing celery stalks together to keep them from sprawling.
  • Start earthing up trenching varieties once the stems reach about a foot tall, banking the soil up by about three inches (8cm) each time until you can hill up no more.
  • Blanch (wrap or cover) stalks to eliminate any bitter taste and produce pale green stalks. Use anything that will keep out light: brown bag paper or cardboard (secure with old nylon stockings, string, vegetable wires), half-gallon milk cartons (cut-out tops and bottoms), or the like. Do not cover the celery鈥檚 leaves.

celery-shutterstock_262679072_full_width.jpgImage: Garden celery. Photo credit: Yuris/Shutterstock.

Types

  • 鈥楢蹿颈苍补鈥&苍产蝉辫;produces tall, slender stalks (up to 30 inches in height) and is a dark green, hardy, quick-growing variety (60 days to maturity).
  • 鈥楥辞苍辩耻颈蝉迟补诲辞谤’ is tolerant of higher temps, water shortages, and average soil fertility.
  • 鈥楪olden Self Blanching’ is an heirloom dwarf with stringless stalks. It’s a good choice for smaller gardens.
  • 鈥楿tah 52-70R Improved’ is good for gardeners with limited space. It will only reach 18 inches tall and is disease resistant.

Harvesting

  • Harvest celery from summer and through the autumn until the first hard frosts stop growth. As a biennial, celery may overwinter in milder climates, producing occasional stems throughout the coldest months and picking up again in spring before finally stretching to flower.
  • You can harvest plants whole, but cutting or picking individual stems as required will keep plants producing over a longer period.
  • The parts of celery that are harvested are mainly the stalks, which will be above ground.
  • Pick the stalks whenever you want. Young celery is as good as the mature product.
  • Harvest stalks from the outside in. You may begin harvesting when stalks are about 8 inches tall.
  • Celery can be kept in the garden for up to a month if the soil is built up around it to maintain an ideal temperature. Celery will tolerate a light frost, but not consecutive frosts.
  • Tip: The darker the stalks become, the more nutrients they will contain. Texture changes with color; dark green stalks will be tougher.

How to Store Celery

  • Keep celery in a plastic bag in the refrigerator. Celery stores really well; you can keep it for many weeks with no trouble. 
  • Celery stalks can be frozen. Cut the stalks into half-inch pieces and store them in freezer-grade bags.
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Wit and Wisdom

  • Keep in mind that grocery store celery is lighter in color and bigger than homegrown celery because the commercial varieties are grown in greenhouses and/or protected from the sun; they may carry a lot of pesticides, too. 
  • Nibbling on celery after a meal helps to clean your teeth and mouth.
  • To crisp limp celery, soak it in cold water with a few slices of potato.
  • The ancient Romans believed that celery had healing powers, especially when it came to headaches. It’s also been thought to cure a hangover, toothache, or arthritis, and serve as an aphrodisiac.
  • Bland or boring? You may be delighted to discover that celery has many benefits. See why celery is heathy and happening.

Pests/Diseases

Celery is relatively trouble-free. To control pests early on, cover the plants with garden fabric (row covers) during the first four to six weeks of the growing season

Celery Pests and Diseases
Pest/DiseaseTypeSymptomsControl/Prevention
Carrot rust fliesInsectWilted/stunted plants; tunnels with rust-color excrement in roots of carrot-family crops; root rotMonitor adults with yellow sticky traps; use row covers; add native plants to invite beneficial insects; destroy crop residue; rotate crops
Cucumber mosaic virusVirusVaries, but may include stunting, mottled green/yellow/white pattern or ringed spots on leaves; distorted leaf growthDestroy infected plants; choose resistant varieties and certified virus-free seed; use row covers; disinfect tools; weed; control aphids (virus carriers); use mulch
EarwigsInsectMany small holes in leaves/stalksTrap in tuna can filled with 1/2 inch of fish oil and sunk in soil such that edge is slightly above ground level; remove plant debris and other nearby hiding places
Flea beetlesInsectNumerous tiny holes in leaves (looks like leaves were hit by a shotgun)Use row covers; mulch heavily; add native plants to invite beneficial insects
Slugs/snailsMolluskIrregular holes in leaves; slimy secretion on plants/soil; seedlings 鈥渄isappear鈥Handpick; avoid thick bark mulch; use copper plant collars; avoid overhead watering; lay boards on soil in evening, and in morning dispose of 鈥渉iding鈥 pests in hot, soapy water; drown in deep container filled with 1/2 inch of beer, or sugar water and yeast, and sunk so that top edge is slightly above ground; apply 1-inch-wide strip of food-grade diatomaceous earth as barrier

Recipes

Summer Corn Chowder
Chicken-Stuffed Tomatoes
Autumn Garden Soup
Chicken Parmesan Potpie
Vegetables
About The Author

Catherine Boeckmann

Catherine Boeckmann loves nature, stargazing, and gardening so it鈥檚 not surprising that she and The Old Farmer鈥檚 蜜桃恋人 found each other. She leads digital content for the 蜜桃恋人 website, and is also a certified master gardener in the state of Indiana. Read More from Catherine Boeckmann
 

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Comments

Is it parsley? That's an herb that looks a lot like celery, especially the flat leaf variety.

Jenna (not verified)

7 years 6 months ago

Hi, I'm doing a science experiment using celery seedlings. I was testing how greywater would affect plants. I had all of the seedlings in a sunny area and I gave them 1/2 a cup of soapy water every second day. My control got watered the same amount every second day but with plain water instead. I didn't use any mulch or fertiliser. All of my plants became yellow, including the control, and I'm not sure exactly what could have caused this to happen. Was it that I was giving them too little water or that they had a lack of nutrients, or could it have been something else?

It’s hard to know, as several things can cause yellow leaves. Fusarium yellows can turn celery leaves yellow, but not sure if it attacks at seedling stage; make sure the soil that you used is sterile. Aster yellows is similar, and is spread by leafhoppers. Check for any pests, such as aphids or leafhoppers. Were your seedlings growing in nutrient rich soil? If not, perhaps it might be that they needed fertilizer. Some nutrient deficiencies can also cause yellow leaves, sometimes affecting either older or younger ones first, or between leaf veins. Make sure that the seedlings have the proper amount of light, and temperature, to make them happy. Check the water amount—curling, yellowing, and drooping limp leaves may indicate overwatering. Wilting or drooping, brittle yellowing leaves, underwatering. Hope this helps!

use filtered water like from a Pure or Brita. Your soap water probably came from the same source as your plain water. whatever the cause, they all got it. Water is the first obvious factor to me. Next would be fertilizer.
If it was a disease like Fusarium, using sterile soil might eliminate this. Bake it in the oven before using. This might not eliminate everything, but using fresh potting soil bought from a store could help.

Interesting experiment.

Robynn Bryar (not verified)

7 years 6 months ago

Just curious if this is possible? I bought 6 baby plants and I thought how cool if I could turn it into 12 plants.

CelerySkeptic (not verified)

7 years 8 months ago

It's not that I have anything against celery, it's just I've never heard anyone say "this needs more celery"

malini (not verified)

7 years 8 months ago

hey i am trying to grow celery from seeds for the first time . the celery germinate but it not getting bigger or tall so i could transplants them to tray .. what could i do to get the celery growing

Celery grows slowly. Make sure that the seedlings have plenty of light — such as by a window (if not too cold or drafty), or under fluorescent growing lights (held about 3 inches above) for 16 hours a day (they do need a period of dark, too). Keep them warm, around 70 to 75F in the day and 60 to 65F at night. Make sure the plants are getting the right amount of water. After a while, they should start to grow taller. Good luck!

Adah Glenn (not verified)

7 years 11 months ago

Hi: I am growing celery for the first time. I sampled a stalk today and it was extremely salty. Is there something wrong with my soil?

Celery does indeed have a mildly salty taste.  But extremely salty?  Are you growing near salt water?