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Planning Your Garden around the School Calendar

Dr. Leigh Whittinghill, Assistant Professor of Urban Agriculture

The first two steps in planning your school garden are finding a good (or as good as possible) location on site and determining how you will grow your crops. Crops can be raised in ground, in raised beds, or in containers. After that, you must decide what to grow.

When selecting crops to grow in your school garden, you should do or consider the following:

  • Work from an existing curriculum, such as the Junior Master Gardener curriculum
  • Plan around a garden theme, such as a salsa, pizza or ABC garden. For more information on planning a salsa garden, check out our fact sheet Making a Salsa Garden (KYSU-CEP-FAC-0018), available at https://www.kysu.edu/documents/college-of-agriculture-communities-the-sciences/salsagarden_2019.pdf
  • Showcase crops commonly found in the grocery store
  • Showcase crops or varieties not commonly found in the grocery store
  • Talk with other programs and teachers
  • Are there crops that fit with cultures or languages being taught?
  • Are there crops that fit with periods of history or literature being taught?
  • What crops might be useful in cooking, nutrition, or other Family and Consumer Sciences classes?
  • Check in with art and science teachers as well to see how they may be interested in using the garden space with their curricula

Once you have some ideas about what crops you would like to grow, you should make a plan or calendar for planting and harvesting activities. For some help with this, check out our fact sheet Developing a Crop Planting Calendar (KYSU-CEP-FAC-0078), available at https://www.kysu.edu/documents/school-of-agriculture-communities-and-the-environment/planting_calendar_with_tables_accessible_031021.pdf. School gardens do, however, have an added challenge of having to contend with the school calendar. Students are around in the spring and fall to help with garden activities but are

often absent during the summer months. Depending on programming at a given school, there may be little to no supervision or maintenance over the summer months. The solution to this issue comes in three parts:

  1. Plant spring crops that can be harvested by the students
  2. Only plant summer crops that can be left unattended
  3. Plant fall crops when the students get back to school

Spring Crops

  • Check that you have enough days between the earliest planting date and the end of school for the variety you have chosen
  • For crops that take less time to mature:
  • Count backwards from the end of school for the latest spring planting date
  • You may be able to get more than one harvest in with some plants (e.g. leaf lettuce and radishes)

in with some plants (e.g. leaf lettuce and radishes)

  • For crops that take more time to reach maturity:
  • You may be able to start transplants earlier
  • Look for more cold tolerant varieties so you can plant them a little earlier
  • If you are going to be around during the summer, try to time them so students see them when they are small, then pick them yourself later
  • Try to select varieties that mature faster

The following table shows some good candidates for spring crops, whether they should be planted from seed or as transplants, when transplants should be started, the earliest planting dates for Western/Central/Eastern Kentucky, and a range of how long it takes plants to mature (days to maturity). For more specific days to maturity, check the information for a specific variety from your seed supplier.

CropsSeed or TransplantDate/Time to start TransplantsEarliest planting dateDays to maturity
BeetsSeed-----March 10/ March 15/March 2055-60
Head lettuceSeed or transplant5-7 weeksMarch 15/March 25/April 160-80
BroccoliTransplantFeb. 5March 30/April 5/April 1040-90
Brussels sproutsTransplantFeb. 5March 30/April 5/April 1080-90
CabbageTransplantJan. 20March 15/March 25/April 160-100
EndiveSeed or transplant3-4 weeksMarch 15/March 25/April 160-90
KaleSeed or transplant4-6 weeksMarch 10/March 20/April 150-60
KohlrabiSeed-----March 15/March 20/ March 2550-70
Leaf lettuceSeed-----March 15/March 25/April 130-50
Mustard greensSeed-----March 15/March 25/April 128-60
PeasSeed-----Feb 20/March 1/March 1560-80
Swiss ChardSeed or transplant5-6 weeksMarch 15/March 20/April 155-60
TurnipsSeed-----March 1/March 10/March 1540-60
Turnip greensSeed-----March 1/March 10/March 1530-50
Green onionsSeed or transplantLate February to mid-MarchMarch 10/March 20/ April 1 March 15/March 25/April 140-60

Summer Crops:

  • Choose varieties that
  • will take the summer vacation to mature
  • will tolerate neglect (water, pests, etc.)
  • If possible, plant seed, transplants, slips right before school lets out and harvest when school is back in session

The following table shows some good candidates for summer crops, whether they should be planted from seed or as transplants, when transplants should be started, the earliest planting dates for Western/Central/Eastern Kentucky, and a range of how long it takes plants to mature (days to maturity). For more specific days to maturity, check the information for a specific variety from your seed supplier.

CropsSeed or TransplantDate/Time to start TransplantsEarliest planting dateDays to maturity
Green beans, poleSeed-----April 10/April 25/May 160-90
PotatoesSeed pieces or slips-----March 15/March 15/March 2090-140
Lima beansSeed-----April 15/May 1/May 1065-90
MuskmelonsSeed or transplantApril 1, 3-4 weeksApril 20/ May 10/May 1575-90
OkraTransplant-----April 20/May 10/May 1550-80
OnionsSeed, transplant, or sets10-12 weeks or late February to mid-MarchMarch 10/March 20/April 1 March 15/March 25/April 1 March 1/March 10/March 1540-120
ParsleySeed-----March 10/March 20/April 170-90
ParsnipsSeed-----March 10/March 20/April 190-110
PumpkinsSeed-----April 20/May 5/May 1090-120
Sweet cornSeed-----April 10/April 20/May 160-100
Sweet potatoesSlipsA few weeksMay 1/May 10/May 20120-140
TomatoesSeed or transplantMarch 15, 4-7 weeksApril 20/May 5/May 1560-90
WatermelonsSeed or transplantMarch 25, 4-6 weeksApril 20/May 5/May 1570-90
Winter squashSeed-----April 20/May 10/May 1580-120

Fall Crops:

  • Check how the latest planting date lines up with:
  • your first day of school
  • harvest dates of summer crops
  • Consider varieties with shorter times to maturity
  • Explore season extension, such as row covers, low tunnels, or high tunnels, to get more time in the fall The following table shows some good candidates for fall crops, whether they should be planted from seed or as transplants, when transplants should be started, the latest planting dates for Western/Central/Eastern Kentucky, and a range of how long it takes plants to mature (days to maturity). For more specific days to maturity, check the information for a specific variety from your seed supplier.
CropsSeed or TransplantDate/Time to start TransplantsEarliest planting dateDays to maturity
BeetsSeed-----Aug. 1/ Aug. 10/Aug. 1570-75
BroccoliTransplantJuly 1July 15/Aug. 1/Aug. 1560-80
CollardsSeed-----Aug. 15/Aug. 20/Aug. 2080-90
KaleSeed-----July 15/Aug. 1/Aug. 1570-80
KohlrabiSeed-----July 15/Aug. 1/Aug. 1560-70
Leaf lettuceSeed-----Aug. 1/Aug. 15/Sept. 140-60
Mustard GreensSeed-----Aug. 1/Aug. 15/Sept. 150-60
RadishesSeed-----Sept. 1/Sept. 15/Oct. 130-40
Snow peasSeed-----July 20/Aug. 1/Aug. 850-70
SpinachSeed-----Aug. 15/Sept. 1/Sept. 1550-60
TurnipsSeed-----Aug. 1/Aug. 10/Aug. 2050-60
Turnip greensSeed-----Aug. 1/Aug. 10/Aug. 2050-60
GarlicSet - cloves-----Nov. 1/Nov. 7/Nov. 15Harvest the following spring/ summer

The following table shows some good candidates for fall crops, whether they should be planted from seed or as transplants, when transplants should be started, the latest planting dates for Western/Central/Eastern Kentucky, and a range of how long it takes plants to mature (days to maturity). For more specific days to maturity, check the information for a specific variety from your seed supplier.

References:

Johnny's Selected Seeds. 2021. https://www.johnnyseeds.com/ Home Vegetable Gardening in Kentucky. ID-128. University of Kentucky Cooperative Extension Service How to Grow Sweet Potatoes. 2016. Michigan State University Available at: https://www.canr.msu.edu/resources/how_to_grow_sweet_potatoes

Educational programs of Kentucky Cooperative Extension serve all people regardless of economic or social status and will not discriminate on the basis of race, color, ethnic origin, national origin, creed, religion, political belief, sex, sexual orientation, gender identity, gender expression, pregnancy, marital status, genetic information, age, veteran status, or physical or mental disability. Kentucky State University, University of Kentucky, U.S. Department of Agriculture, and Kentucky Counties, Cooperating. 2021 KYSU-CEP-FAC-0093