The Great Pumpkin Challenge, Part One: Double Digging

One of the best things about growing for a school is the freedom to explore and learn about new crops right alongside my students. This winter, I got a bee in my bonnet to try out a crazy crop I've never grown before: Dill's Atlantic Giant Pumpkin, the granddaddy of all giant pumpkins. 

I love the whimsy of a giant pumpkin. It brings to mind images of Hagrid's garden or Cinderella's carriage. There's a problem, though. I have horrible luck with all plants in the squash family. Growing without the aid of synthetic chemicals, I can only get one or two early rounds of squash from a plant before I'm beaten my two greatest nemeses: squash bugs and squash vine borers. To be honest, I'm a little nervous about growing a pumpkin at all, much less the world record-holding species for size and weight. Go big or go home, right? 

If everything goes well and I actually produce a pumpkin, it won't be ready until fall, but it's time to start the growing process now.

Healthy plants come from healthy soil. Last summer, I added about ten cubic yards of pure cotton burr compost to this raised bed. Over the fall, I grew radishes, beets, mustard, chard, lettuce, spinach, and turnips in it. I got too busy and ran out of time to plant a good winter cover crop, so I just mulched unused areas of the bed with straw. (Healthy soils want to be covered at all times!)

Here's what the bed looks like now.

I've started to rake away the straw mulch that I used over the winter in order to double-dig this behemoth of a bed

Double-digging is a soil preparation technique associated with the Biointensive growing method. According to Ecology Action, double-dug beds "aerate the soil, facilitate root growth, and improve water retention." Soil fertility is maintained through the heavy use of compost.

To get started, you measure off the area that you want to dig. I'm starting with a 2 x 20 foot section. I set out flags to show divide the area in 2 x 2 foot squares. 

Before you dig, please make sure that the area is free from water or gas lines. 

mary riddle double digging

Start with your first square and shovel the top 12 inches of soil into a wheelbarrow. Then, take a pitchfork and loosen up all of the newly-exposed soil underneath. I don't move on until I can sink my pitchfork in 12 inches without effort.

Move on to your next square. Shovel the top 12 inches of that square into the empty hole you just created. Again, take your pitchfork and loosen the exposed soil. Repeat that process with square after square. When you reach the end, fill the final hole with the soil waiting in your wheelbarrow. 

To ensure that I'm not compacting the soil when I'm working in the beds, I stand on a plank in order to more evenly distribute my weight through a larger area. 

I've got a lot more of this bed to finish. This is an intense workout, so my back demands that I take my time. I'm getting started now so that I can be ready to transplant pumpkins into the bed by Zone 7's April 15th final frost date. 

Stay tuned. You can follow along with #TheGreatPumpkinChallenge on my social media pages

Keep your fingers crossed for me! 

Mary Riddle

Look at that nice, fluffy soil! Now where did I put that Instagram filter that removes all those weeds?

Look at that nice, fluffy soil! Now where did I put that Instagram filter that removes all those weeds?