Vegetable Garden - Tips on Growing Celery Seeds
98-130 Days to Harvest Because Celery's ancestors were marsh dwellers, it needs a steady supply of moisture, more than most other Garden Vegetables, however the drainage is critical to avoid root rot.
- A very good trick is to fill bottomless cans with water (take a sterilized soup can and take off the top and bottom) and place these cans in the soil between the plants, which should be transplanted 8-10 inches apart, and then filling the cans with water from your hose.
- Celery plants are heavy feeders, so put some compost in the planting hole and give the plants extra feedings of a safe vegetable fertilizer and follow directions exactly or you can add a fish emulsion about twice a month.
- Celery may be planted indoors in February or March and set out about two weeks after the last expected frost, or sown in April or May for a fall crop.
- If temperature at planting time is unfavorably high, exposure to light will help to stimulate germination, you should alternate temperatures by having it warmer by day, and cooler at night. At the preferred lower temperature, light does not seem to make a difference.
- When hardening off the plants, avoid chilling the plant below 50ºF (10ºC) or it probably will bolt to seed.
Celery can take up to three weeks to germinate, depending on temperature.
If you Need to Sow Indoors in late winter (however this is not the recommended way)
- (February - March) by broadcasting seeds in a flat and covering with a fine potting mix no more than ¼" deep.
- Be patient and keep well watered in a cooler part of the greenhouse.
- When seedlings are 1" high, move into 4" pots.
- In mid-spring put outside to acclimate. Plant into soil, keeping well watered throughout the growing cycle.
- When plants begin to reach their full height, mound up earth 6" around their base, and insert the water cans as described above. We have 1000 seeds per package due to low germination rate of celery.
Direct Sow (recommended)
- Celery Seed Planting Depth: 1/8"-1/4"
- Germination Soil Temperature for Celery Seeds : 75°F (24ºC)
- Soil Temperature for Growing: 60-70ºF (16-21ºC)
- Days to Germ.: 14-25
- Plant Spacing: 8"-10"
- Days to Maturity: 98-130
- Partial/Full Sun
- Water Frequently
USDA Hardiness Zone -First Frost Date- Last Frost Date
- Zone 1 -July 15th -June 15th
- Zone 2 -August 15th- May 15th
- Zone 3 -September 15th May 15th
- Zone 4 -September 15th May 15th
- Zone 5 -October 15th April 15th
- Zone 6 -October 15th April 15th
- Zone 7 -October 15th April 15th
- Zone 8 -November 15th March 15th
- Zone 9 -December 15th February 15th
- Zone 10 -December 15th January 31st (sometimes earlier)
- Zone 11 -No frost. No frost.
To be sure about pH, test the soil with a pH meter. Apply fertilizer and lime using the results of the soil test as a guide.
- Soil pH is a measurement of the number of Hydrogen ions present in the soil solution along with as the acidity of the soil. When the soil pH is too acidic the nutrients that are present in the soil become locked-up or unavailable (low pH) or alkaline (high pH).
- Correcting the pH has the same effect as applying fertilizer as it unlocks plant nutrients already present.
- In the garden some garden plants thrive in acidic soils while others prefer an alkaline soil.
- The acidity or alkalinity of soil is a measurement by pH (potential Hydrogen ions). pH is a way to measure the amount of lime (calcium) contained in your soil, and the type of soil that you have.
To Measure Soil pH
It is recommended that you use a relatively inexpensive, and follow the manufacturers instructions when testing the pH Level of your Gardens soil. To raise or lower the pH level in the soil either Limestone or Sulfur is utilized. Other materials will accomplish the same results; however the two that are listed are the most commonly used.
Limestone is added to the soil to raise the pH level because limestone is essentially calcium and calcium reacts with water in the soil to yield hydroxyl ions .. a process known as, hydrolysis = thus the pH level in the soil is raised.
Sulfur reacts with bacteria in the soil and produces sulfuric acid, which releases hydrogen ions thus causing the soil to become more acidic =the pH level is lowered.
Application Of Lime (To Raise Soil pH)
To increase your pH by 1.0 point and make your soil more alkaline.
- Add 4 ounces of hydrated lime per square yard in sandy soils
- Add 8 ounces of hydrated lime per square yard in loamy soils
- Add 12 ounces of hydrated lime per square yard in clay soils
- Add 25 ounces of hydrated lime per square yard in peaty soils
- The addition of ash, bone meal, or crushed oyster shells will also help to raise soil pH levels.
Application of Sulfur (To Lower Soil pH)
If your soil needs to be more acidic, sulfur will lower the pH if it is available.
To reduce the soil pH by 1.0 point
- Mix in 1.2 oz of ground rock sulfur per square yard if the soil is sandy
- Mix in 3.6 oz per square yard for all other soils.
- Composted leaves, wood chips, sawdust, leaf mold and peat moss, will also help to lower the soil pH.