How to Grow Celery: Expert Tips for Success

Written by
Michael Sullivan
Reviewed by
Prof. Martin Thorne, Ph.D.Discover the best ways to grow celery from seeds or kitchen scraps,
Opt for heat tolerant varieties like Ventura for growing in a warm climate,
Ensure you provide consistent moisture, through 1 inch of watering enough daily, to avoid bitterness in stalks,
Start seeds indoors 14-20 weeks before the last frost date to transplant.
Re-grow celery scraps with toothpicks to avoid decay,
Harvest outer stalks when 8-10 inches tall for an ongoing supply.
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Learning how to grow celery gives you crisp stalks full of flavor. The taste of homegrown celery surpasses that of store-bought versions, and its nutritional value is equally superior. Additionally, kitchen scraps can be used to grow new plants, saving you money and reducing waste. Plus, beginners find regrowing celery easy, starting with a base from the grocery store.
Teach your children the cycles of plant life by growing celery. It was great fun watering it with them and watching for progress. Celery can be grown in a multitude of ways in your kitchen. Enjoy it fresh in salads, or use it in stews and soups. It takes about five months from seed, but wait with patience, and your crops will be abundant.
Choosing Celery Varieties
A wise choice of variety will assure you of success. Tango has crisp stalks and grows very well for beginners; Ventura will not bolt at 85°F (29°C). Avoid Utah Tall unless you keep your watering schedule constant: the stems become hollow otherwise.
Chinese Pink, while contributing bright color to the garden, must be left out of the table. It's beautiful, bright pink stalks are loaded with a piquant alkaloid. They are very bitter, so that it is altogether a waste of space to consider them other than for ornamental use. Go in for the Golden Self-Blanching; a strong grower, free from disease and insect pests, with a sweet, warm flavour.
Select varieties that suit your climate conditions, i.e. cooler regions plant coldparents, and warmer areas plant heatresistant ones be mindful of the fact that some grow much quicker than others, and may be ready to harvest before others, in which case you need to read the seed packets instructions as to how many days to harvest, so that you are not disappointed when you come to plant out your patch.
Ideal Growing Conditions
CELERY requires a soil of pH 6.0-7.0. Have your garden soil tested at your local university extension services or with a home kit. If the soil is already alkaline, amend it several months in advance of planting. Work some sulphur into the top layer. Also, add compost for nutrients. Celery cannot thrive in poor soil; it will soon wither and die. When you prepare your beds, dig deeply enough to give the roots a good chance.
Temperature. Celery is very susceptible to temperature fluctuations; keep plants at a temperature between 50°F and 80°F. F., otherwise when the temperature is below 10 °C. At 40 degrees, it will shoot to seed; above 80 degrees. F. The stalks become bitter. Sun screens should be stretched during a hot wave from tow cloth; frost kills all instantly. The seedlings, approaching frost, should be protected by cloches.
Grow for 14-20 weeks from seeding. It's a long time, and requires patience, so start them off well indoors in cool climates. Protect the young plants from the inclement weather, or they may suffer. Be sure to water regularly, or they won't bloom properly. You'll have to wait a little longer for your harvest; however, you'll be rewarded at last with goblet-shaped, beautiful stalks of the most exquisite flavor.
Soil Requirements
- pH Range: Maintain 6.0-7.0 acidity. Test soil via university lab services; amend alkaline soils months before planting with sulfur or organic matter.
- Composition: Use deep, loose soil enriched with compost. Celery is a heavy feeder requiring nutrient-dense conditions for optimal stalk development.
- Containers: Select pesticide-free potting mix formulated for vegetables when growing in pots or raised beds.
Temperature Range
- Optimal: 50-80°F (10-27°C). Temperatures below 50°F (10°C) for over 7 days trigger premature bolting.
- Heat Management: Provide afternoon shade when temperatures exceed 80°F (27°C) to prevent bitterness and stalk toughness.
- Microclimates: Utilize walls or taller plants for wind protection in cooler regions.
Light Exposure
- Daily Needs: Minimum 6 hours of direct sunlight. Morning sun with afternoon shade prevents heat stress in summer.
- Indoor Growing: Use full-spectrum LED lights positioned 6-12 inches (15-30 cm) above seedlings for 14-16 hours daily.
- Seasonal Adjustment: Rotate containers for even light distribution during shorter winter days.
Planting Timeline
- Spring Crop: Start seeds indoors 14-20 weeks before last frost. Example: Sow February 1 for June 1 transplant.
- Fall Crop: Sow 18-20 weeks before first frost. In zones 5-7, plant May 15-30 for September harvest.
- Succession Planting: Stagger sowings every 3 weeks for continuous harvest in mild climates.
Climate Adaptation
- Cool Climates: Use black plastic mulch to warm soil. Choose cold-tolerant varieties like Ventura.
- Hot Climates: Plant in partial shade and increase watering frequency. Mulch with straw to retain moisture.
- Humid Regions: Ensure 8-inch (20 cm) spacing between plants for airflow to prevent fungal diseases.
Starting and Caring for Celery
Celery seeds also need light to germinate. Just scatter them over the soil without covering. Use a heat mat to maintain tray temperatures at 70°F (21°C). Cover the trays with plastic domes to maintain humidity, and mist them daily to prevent them from drying out. Plants will sprout in 7-14 days if kept at a warm temperature.
Water celery thoroughly at the roots. Provide 1 inch (2.5 cm) daily if needed. Check the soil moisture both in the morning and evening, using a finger stick if necessary, and drip or tube-irrigate plants at the base of the roots. Container plants need watering until the water drains freely from the bottom. Keep about 0.5 inch (1.3 cm) of water in the saucers. Plant wilting means immediate watering.
To ensure healthy, productive growth, feed your plants regularly. Please give them a drink of compost tea at planting, then seaweed extract every three weeks. Try about 2 tablespoons to a gallon (30ml to 4 litres). Side-dress with aged manure in the summer months, and lush, yellow leaves will reflect the need for extra nitrogen. At the same time, brown tips indicate a lack of potassium.
Transplant seedlings that have been hardened off and moved outdoors over a period of 1 to 2 weeks. Plant them so that the root balls are completely buried, ideally 24 inches (60 cm) apart, and water them in well. Provide shade if the temperature is above 75°F (24°C) to prevent transplant shock.
Seed Starting Process
- Surface Sowing: Place seeds on soil without covering; light triggers germination.
- Heat Mat: Maintain 70°F (21°C) using heating mats until sprouts emerge (7-14 days).
- Moisture Control: Cover trays with plastic domes; mist soil daily to maintain humidity.
- Timing: Start indoors 14-20 weeks before last frost for robust seedlings.
Watering Requirements
- Depth: Provide 1 inch (2.5 cm) of water daily at root zone; use drip irrigation.
- Consistency: Avoid dry spells; celery bolts when stressed. Check soil moisture morning and evening.
- Containers: Water until drainage occurs; use saucers to maintain 0.5 inch (1.3 cm) water reserve.
- Signs of Stress: Wilting or pale leaves indicates immediate watering needed.
Fertilizing Schedule
- Transplant Boost: Mix compost tea into planting hole (1 cup per plant).
- Mid-Growth: Apply seaweed extract every 3 weeks (2 tbsp/gallon or 30ml/4L).
- Organic Options: Side-dress with aged manure 8 weeks after transplanting.
- Deficiency Signs: Yellow leaves indicate nitrogen shortage; brown tips suggest potassium lack.
Transplanting Techniques
- Hardening Off: Expose seedlings to outdoor conditions gradually over 7-10 days.
- Planting Depth: Bury root ball completely; keep original soil line visible.
- Spacing: Allow 8 inches (20 cm) between plants in rows 12 inches (30 cm) apart.
- Aftercare: Water thoroughly; shade for 2 days if temperatures exceed 75°F (24°C).
Pest and Rot Prevention
- Squirrel/Rabbit Deterrent: Use chicken wire cages or elevated containers.
- Fungal Control: Space plants for airflow; water at soil level to keep leaves dry.
- Scrap Regrowth Tip: Suspend celery bases with toothpicks above water to prevent rot.
- Companion Plants: Grow onions nearby to repel pests naturally.
Regrowing from Scraps
Prevent it from rotting by regrowing store-bought celery using the toothpick suspension method. Chop off the bottom 2 inches (5 cm) from the end of a store-bought celery head. Stick toothpicks about an inch and a half from the bottom so that the celery base can be suspended over a clean jar of water with just the base soaking.
Water depth should be 1 inch (2.5 cm) in a shallow container. Change the water every 48 hours to prevent bacterial growth. Place by an east window. Never store the container at room temperature above 80°F (27 °C). New leaves will appear in three to five days if proper care is taken.
Transplant when roots reach 1 inch (2.5 cm) and have several strands, plant in organic vegetable soil. Set out of the ground so that the roots are planted deep, but leave the stump head above the surface. Water well until thoroughly soaked. Protect the leaves from the sun for three days if they droop.
Recap any problems with regrowth as soon as you spot them. Use tweezers to pull out any slimy-looking stalks to prevent rot (with the lower end angled so that it will be submerged), and keep the water at 65-75°F (18-24°C) for quicker roots. Apply rooting hormone if no roots appear after two weeks. Increase the light if the new growth is leggy.
Preparing the Base
- Cutting: Slice 2 inches (5 cm) from root end of store-bought celery. Use sharp knife to avoid crushing vascular tissues.
- Toothpick Method: Insert 4 toothpicks equidistantly 1.5 inches (3.8 cm) from bottom to suspend base above container base.
- Sanitization: Rinse cut surface under cool water to remove debris. Optional: Dip in diluted hydrogen peroxide (1:10 ratio) to prevent mold.
Water Propagation Phase
- Container Setup: Use shallow glass jar/bowl. Fill with room-temperature water to submerge 1 inch (2.5 cm) of root end.
- Location: Place near east-facing window for gentle morning sun. Avoid direct midday light exceeding 80°F (27°C).
- Maintenance: Change water every 48 hours. Inspect for sliminess; scrub container with vinegar if biofilm forms.
- Progress Signs: New leaves emerge in 3-5 days; white roots appear at base within 7-10 days.
Transplanting to Soil
- Timing: Move to soil when roots reach 1 inch (2.5 cm) length with multiple fibrous strands.
- Soil Mix: Use organic vegetable potting soil. Create hole deep enough to bury roots while exposing cut end.
- Technique: Gently pack soil around roots. Water until saturated. Maintain moist soil for first week.
- Aftercare: Shield from direct sun for 3 days. Use humidity dome if leaves droop initially.
Growth and Harvesting
- Watering: Keep soil consistently moist. Insert finger 2 inches (5 cm) deep; water if dry.
- Fertilizing: Apply balanced liquid fertilizer (5-5-5) every 4 weeks after transplant.
- Harvest Technique: Snap outer stalks at base when 8 inches (20 cm) tall. Inner stalks continue growing.
- Leaf Usage: Collect young leaves for salads; mature leaves for soups/stocks.
Troubleshooting Common Issues
- Rot Prevention: Suspend base above water. Remove slimy outer stalks immediately with tweezers.
- Slow Root Growth: Maintain water temperature of 65-75°F (18-24°C). Add rooting hormone gel if no roots in 14 days.
- Pest Control: Spray aphid-infested leaves with soapy water (1 tsp dish soap per quart/0.9L).
- Leggy Growth: Increase light exposure gradually to 6 hours daily if stalks appear pale and elongated.
Harvesting and Storing
Harvest stalks and leaves of celery differently; break off the outer stalks by snapping them down to the soil when they are 8 to 10 inches (20 to 25 centimeters) in height, and be careful not to injure the crown of the strongest plant. The young inner leaves of the center stalk are used for salads, and the older outer leaves are used for cooking; always leave three or four to grow.
Store celery in the refrigerator at 32-36°F (0-2°C). Wrap the stalks tightly in damp paper towels and place them in perforated plastic bags. For extra crispness, stand upright in 1 inch (2.5 cm) of water. This method will keep celery fresh for 2 to 3 weeks.
Celery can be frozen using the blanching method. Boil individual pieces for 3 minutes, then plunge quickly into ice water. Wipe dry before packing into suitable containers. These can be plastic airtight containers or vacuum-sealed bags. Clearly label with the date so that the old product can be used first. They retain their flavor for 10 to 12 months.
If you handle it well, Celery will regrow after you harvest it. Simply keep the central crown intact, and plants will grow new stalks for 2-3 months continuously. Use those stalks in combination with carrots and onions for freezer mirepoix packs - what a great way to make the most of the harvest.
Optimal Harvesting Methods
- Stalk Harvest: Snap outer stalks at soil level when 8-10 inches (20-25 cm) tall. Use twisting motion to avoid damaging crown.
- Leaf Harvest: Clip young leaves from center for salads; mature leaves for cooking. Leave 3-4 inner stalks for continued growth.
- Whole Plant Harvest: Cut entire plant 1 inch (2.5 cm) above soil if bolting occurs. Best before temperatures exceed 85°F (29°C).
- Regrowth Potential: Plants regenerate new stalks for 2-3 months if crown remains intact.
Refrigeration Techniques
- Preparation: Rinse stalks; pat dry. Wrap in slightly damp paper towels to maintain humidity.
- Container Method: Store in perforated plastic bags to allow airflow. Ideal temperature: 32-36°F (0-2°C).
- Hydration Trick: Stand stalks upright in 1 inch (2.5 cm) water in refrigerator drawer for extra crispness.
- Duration: Maintains freshness 2-3 weeks. Discard if stalks become limp or develop dark spots.
Freezing Preservation
- Blanching: Submerge stalks in boiling water 3 minutes, then ice bath. Stops enzyme degradation.
- Preparation: Cut into 1-inch (2.5 cm) pieces or leaves. Pat dry thoroughly before freezing.
- Storage: Use airtight containers or vacuum-sealed bags. Label with dates.
- Shelf Life: Retains flavor 10-12 months. Best used in cooked dishes due to texture changes.
Leaf Processing
- Drying Method: Spread leaves on baking sheet. Dry at lowest oven setting (150°F/65°C) for 2-4 hours until crumbly.
- Storage: Crush dried leaves into jars; store in dark cupboard. Use within 6 months.
- Flavor Tip: Combine dried celery leaves with parsley and lovage for homemade seasoning blend.
- Freezing: Chop fresh leaves; freeze in ice cube trays with water or olive oil.
Usage Recommendations
- Fresh Use: Consume refrigerated stalks within 10 days for optimal crunch in salads.
- Cooking: Frozen celery works best in soups/stews added during last 15 minutes.
- Flavor Enhancement: Use dried leaves to intensify flavor in stocks and sauces.
- Companion Preserving: Combine with carrots and onions for pre-chopped mirepoix freezer packs.
5 Common Myths
Celery requires full sunlight all day to develop thick, crunchy stalks.
While celery needs adequate light, excessive sun exposure above 80°F (27C) causes bitterness and bolting. Optimal growth occurs with 6 hours of direct morning sun and afternoon shade. In hot climates, partial shade preserves moisture and prevents cellular stress that leads to hollow stalks. Container gardeners should rotate plants to balance light exposure throughout the day.
Some gardeners maintain that regrown celery from kitchen scraps has less flavor than celery started from seed.
When given adequate nutrients, celery regrown from scraps can develop the same flavor profile as those from seeds. This myth was likely popularized due to the improper way that the gardener was growing the celery, either by not changing the water or not providing enough light. Very mature celery, grown from scraps, contains the same phthalide compounds found in their flavor, and flavor intensity is more dependent on soil nutrition and harvesting timing than on propagation.
A frequent myth is that putting celery seeds in the ground enhances the rates of germination success.
Celery seeds need to be sown on the surface, as the light allows the germination enzymes to be stimulated. If seeds are buried more than 1/16 inch (1.5mm), the sprouting rates will reduce by 70%. The little seeds without energy reserves can't push through soil. Instead, simply press the seeds gently onto a moist potting mix underneath plastic domes at 70°F (21C) and mist once a day until the seedlings have emerged.
Celery grows quickly like lettuce and can be harvested in 30 days.
However, its bolting phase from germination to maturity is an extended period of time, taking 100-130 days from seed due to its developing vascular system. Celery is not a leafy green, but forms complex cellulose structures in its stalks over a span of 4-5 months. Harvesting too quickly will lead to bitter, thin stalks. You can continue succession planting every three weeks for a staggered yield, just remember it will take time for each plant to develop its full flavor.
Many people assume every variety of celery tastes the same and that is correct; they are the same species.
However, there is a range of significant flavor differences in varieties, thanks to terroir and selective breeding influences. Tango is mild and crisp making it great for raw use while Chinese Pink has alkaloids that make it unpalatable. Heat-tolerant Ventura develops deep savory notes in hot climates. Soil pH can also make a difference in flavor compounds; varieties such as Golden Self-Blanching develop improved sweetness in soil with higher acidity.
Conclusion
There is something exceedingly satisfying about growing your own celery, whether you start seeds or use the roots and base of the plant. You are growing it from a "baby," nurturing it through the stages to harvest. You learn patience and perseverance. The result is crisp, exploding with flavour. Nothing can compare to your homegrown variety!
Homegrown celery costs less and tastes better. Just one plant can produce for several months. Try the heat-tolerant Ventura, or experiment with regrowth. Discover what works best for you and cultivate this rewarding vegetable your way.
There's no time like the present: Start your stalks today, and plant seeds indoors now. Regrow from a scrap base left from dinner and enjoy the satisfaction of harvesting your own food. Share this sustainable act with family. What will your garden next seek to become?
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Frequently Asked Questions
What is the trick to growing celery?
Success requires consistent moisture management and soil preparation. Celery thrives when you maintain even watering to prevent bitterness, enrich soil with compost before planting, and provide afternoon shade in warm climates. Proper spacing also ensures adequate airflow to reduce disease risk.
How long does it take celery to grow?
Celery has a lengthy maturation period from seed to harvest. Most varieties require multiple months to develop fully:
- Seed starting to transplant: 10-14 weeks indoors
- Transplant to first harvest: 8-12 weeks
- Total growing season: 18-26 weeks
Why is celery difficult to grow?
Celery demands precise conditions that challenge gardeners. It's sensitive to temperature fluctuations, requires constant moisture without waterlogging, and needs nutrient-rich soil. Additionally, it's vulnerable to pests like aphids and diseases like leaf blight without proper care.
How do I grow celery from celery?
Regrowing from scraps is simple with proper technique:
- Cut 2-inch base from store-bought celery
- Suspend with toothpicks over water-filled container
- Change water every two days until roots form
- Transplant to soil when roots reach sufficient length
Does celery like full sun or shade?
Celery prefers balanced light conditions for optimal growth. While it needs substantial sunlight, excessive exposure causes issues:
- Ideal: 6 hours morning sun with afternoon shade
- Hot climates: Partial shade to prevent bolting
- Containers: Rotate for even light distribution
Are coffee grounds good for celery?
Coffee grounds offer benefits when used correctly in celery cultivation. They provide nitrogen and improve soil structure, but require moderation:
- Mix into compost rather than applying directly
- Limit to avoid excessive soil acidity
- Combine with balanced organic fertilizers
What should not be planted next to celery?
Avoid companion plants that compete for resources or attract shared pests. Problematic neighbors include:
- Corn (excessive nutrient competition)
- Potatoes (vulnerable to same fungal diseases)
- Parsnips (mutual pest attraction)
Can you leave celery in the ground over winter?
Celery tolerates light frost but not extended freezing. Overwintering success depends on climate conditions:
- Mild zones: Mulch heavily for frost protection
- Cold regions: Harvest before first hard freeze
- Containers: Move indoors near sunny windows
Is it worth growing your own celery?
Homegrown celery offers significant advantages over store-bought. Benefits include superior flavor intensity, pesticide-free stalks, and cost savings over time. The process also provides gardening satisfaction and access to unique varieties unavailable commercially.
Does celery regrow after cutting?
Celery regenerates when harvested properly. By snapping outer stalks at soil level while preserving the central crown, plants produce new growth for continuous harvests throughout the season with adequate water and nutrients.