The Dingess Purple Sweet Potato

Two Slips survived to make some beautiful sweet potatoes

Dingess Purple Sweet Potatoes were probably one of my favorite sweet potatoes to harvest this year. This was not only because the plant exhibited vigorous growing vines to begin with, but because the harvest is of marketable size and shape. Unlike the All Purple, which may root a foot under the surface, this variety tends to root near the top in more round tubers - making harvest much easier.

The younger slips and vines of the Dingess Purple can be hairy in appearance.

I would like to say that Dingess Purple will be one of my main varieties for next year, but I still need to do a taste test and rate each of my varieties accordingly. Though there is some anecdotal information about the taste of this variety on Tomatoville, there is nothing like doing a taste comparison to determine what variety will work best for the long-run.

My Dingess Purple Crop just as it came out of the ground.

After harvesting the first Dingess Purple potatoes, I became concerned that the interior may not contain a dark enough flesh. To determine the general color of this variety I cut a cross section of a smaller potato to see how it looked.



Dingess Purple Color looks good.





A long Dingess Purple Sweet Potato

  

 



A decent-looking Dingess Purple Sweet Potato



 

 

Though the harvest was not as much as it could have been (compared with the Purple Delight), it was over 15 pounds. Dingess Purple does an incredible job producing sweet potatoes that are just the right size for the market. As long as the flesh of this variety exhibits good taste and texture I will be growing this variety for many years to come.

   

The Dingess Purple Vines produced mostly marketable Sweet Potatoes

Purple Delight Sweet Potato Harvest

Before I was even finished harvesting last year’s sweet potato crop, I began to plan out how to trial my sweet potato varieties for this year. The delay between placing my order in November and receiving the sweet potatoes in a battered priority shipping box in May provided me time to think about how I could prepare to have a better harvest this year.

 

My poor-looking Purple Delight Slips

The battered priority mailbox that contained my sweet potato slips

My first encounter with the sad-looking slips I received in mid-May left me wondering if they would make it a week, let alone a season, in my garden. Having seen a slight improvement in the growth of my All-Purple Sweet potatoes in April with the application of EM-1, I decided to add some EM-1 to the plot. As the slips finally established themselves I honestly expected very little but still held out hope for the best.

My Purple Delight sweet potato slips (to the left of the bush bean)

The harvest of root crops can be both exciting and scary - in that the gardener has no idea what good (or bad) could possibly lie just under the surface of the soil. The longer the span of time the crop requires to mature, the longer the gardener is left to imagine how the tubers are growing, with only the top of the plant to give any clues to the health of what lies below. Revealing what lies under the ground is like unwrapping a large gift, not knowing beforehand if it contains something really wonderful or something you would rather give away.

The area that the Purple Delight covered is in the foreground

The Purple Delight Vines take up roughly 1/5 of the area on the bottom left

Because my life has been so busy I have not really had the time to take harvesting my sweet potatoes seriously until a few days ago, when I realized that the night temperatures would soon dip below freezing. My first priority was to determine how well the new purple varieties had grown and I wanted to harvest these two varieties first, so that I could compare them to my All-Purple variety. From cleaning out some vines in the area of my Purple Delight sweet potato vines I soon found enough potatoes outside of my garden bed to start filling up a bucket.

A few Purple Delight potatoes I harvested outside of the garden

Soon thereafter came the moment that every gardener either hates or loves: digging to find out what is in the garden bed. Here are a few pictures I took while digging around:

Are there any Sweet Potatoes in there?

Pulling out the first Sweet Potatoes

I think I found something

A closer look (the black thing is a soaker hose)

Exposing a few more potatoes, the next day.

Accessing sweet potatoes sometimes requires me to dig a little

The Purple Delight Sweet Potato Crop

Over time I have developed three main criteria that I aspire to have my sweet potato crop meet: Large production, high quality dark flesh, and marketable size and shape.

This potato turned up to be a bit too big to easily sell

My favorite potato retained its beauty and high quality flesh even at a large size

 As shown in the pictures, the Purple Delight produces well (48+ pounds from one root ball) and the exhibits a very dark purple color. Although the shape and size of roots varied greatly there seemed to have been very few (if any) “woody” roots.

The over 48 pounds of Purple Delight Sweet Potatoes

Overall, I would have to say that I have been very pleased with the Purple Delight sweet potato. Of all people, I would have never dreamed at the outset that the scrawny slips from a battered box would produce so well.





 

Note: Purple Delight is also known as Alabama Purple. I will definitely be doing some taste testing in the future!

2013 Orange Sweet Potato Harvest

This year’s Orange Sweet Potato crop may look very poor, but given that it was crowded out by other varieties it did well. I was not expecting much more than 5 pounds from this variety and that is about what I got. Of all my sweet potato varieties I have grown, this simple orange one is very good and I will most likely be allocating more room to these sweet potatoes next year.





A small harvest, but given the space allocated the vine produced well

  

Garden Cutbacks

With all the cutbacks going on in the government and within companies, it is nice to know that I can control when I want to cut back my summer garden. Having two gardens can be nice in how much food I can produce, but the drawback comes when the older garden encroaches on the newer one and insects migrate from one garden bed to the other.

A few buckets of marketable (top) and unmarketable (bottom) purple sweet potatoes
Note - the lighting in my waterheater closet makes them look red.

 

Because I can garden year-round the frost turns out to be a welcome relief from insects and the problems they cause. Leaf-hoppers, spider mites and cucumber beetles – all of which can cause disaster in my garden - tend to die off after the first frost.

 

I had to cut these sweet potatoes back to make room for my winter garden

 

It is time for cutbacks - to my summer garden!

 

 

Even though frost can create a burden in harvesting my summer crop, the harvest allows me to take an inventory of what worked and what didn’t. For example, much of my All-Purple sweet potato variety did not produce as much as I had anticipated – though some others produced very well. I am still harvesting so I will be sure to post updates.

 

What could be under the carpeting in the walkway between my gardens?

 

Surprise!

 

As stated in my post about the All-Purple sweet potato, the juice of purple sweet potatoes can be used to determine pH of a substance. In this case, the water in the cup is from some purple sweet potatoes that I steamed. Notice the dark green color. Tucson water is definitely full of minerals and alkaline.

 

Cooked All-Purple Sweet Potatoes with Tucson water on the left

 

Gardening for Geeks by Christy Wilhelmi

Occasionally I will encounter a gardening book that will present completely new or detailed information that is not found in many other places. But for the most part, when I pick up a gardening book, I often find the book catalogues the ideas presented by others in various books and publications rather than introduce a new concept. Although Gardening for Geeks by Christy Wilhelmi fits much more into the second category than the first, it is still worth a read. Much of what I read in this book, although compiled from other works, included some good summaries of already existing reading material.

 

It was definitely worth looking through this book.

 

Even though many of the gardening methods presented in this book, including square-foot gardening, are really good sometimes I wonder how much they get what happens in my region, such as the high potential for insects and disease to completely wipe out a bed of lettuce or tomato plants. It is not that writers of gardening publications are purposefully misguiding readers, but when you live in an extreme climate it can be easy to feel that garden book authors just don’t get it. That being said, some of the biointensive methods, such as the French Intensive, hexigonal planting  and the 60:30:10 method really interested me. Even without knowing much about the French intensive method before digging my 24 inch deep mostly compost beds, it seems as if I am doing many of the same things that the French intensive method promotes.

The most helpful bit of information I learned about was from a book called How to Grow More Vegetables by John Jeavons. According to Jeavons (as cited by Wilhelmi) a gardener can make their garden much more sustainable if they grow utilizing a 60:30:10 formula for sustainability. The premise of this sustainability formula is to have the land produce food for both the gardener and the garden. Apparently it should be able to produce enough food for one person by utilizing only 4,000 square feet of garden space. The way this formula works is to commit 60% of garden space to crops that return large amounts of carbon and nitrogen back into the soil such as grains, fava beans and cover crops to create mostly biomass to be composted and some food. At the same time, 30% of the garden should be designated for high-calorie crops, such as potatoes, sweet potatoes, parsnips and Jerusalem Artichokes. Lastly, Jeavons says that 10% of the garden space/time can be devoted to tomatoes, peppers, squash, lettuce, carrots, etc.

 

My high-calorie sweet potato crop knows no bounds as it grows into the alley. (=

While I have slowly moved towards a method like John Jeavons’ biointensive method I never thought that it could be related to biomass. Many of the 60 and 30% crops deserve more time and room in the garden because they are much less work for the organic gardener in relation to pests and disease than because they “environmentally friendly”. Though most intensive gardeners may scoff at the idea of dedicating so much of their plots to corn and potatoes, perhaps they will decide to raise more grain and high-calorie crops when times get tough and they require a garden that is more self-sufficient.