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ManyTracks Organic Gardening
 with Sue Robishaw

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"Growing Berries for
Food and Fun"
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Stevia

stevia plant in garden mid June

Four decades of Growing Good Food in the Northwoods of Michigan's Upper Peninsula
~ ~ ~
Down to Earth Information, Experiences, Thoughts

Flowers and herbs have often been afterthoughts in my garden, being stuck here and there wherever there was a little space. Not that I didn't appreciate them but when I'd think of gardening it was usually the practical food that came to mind first, and got the most attention. But when I started expanding the orchard and thinking of the whole area as one I became more up-front aware and purposeful in my planning and planting of those often humble but so essential flowering plants. And I'm thoroughly enjoying the process.


Stevia, a Sweet Report
- January 22, 2019

stevia ground jarsI grew some stevia this past season for the first time, a mild interest that caused me to add it to my Fedco seed order at the last minute. I’d read that it was hard to grow from seed and likely needed a warmer climate than here but I decided to give it a try anyway.

Planted in the quite cool greenhouse the end of February, along with peppers and a few other early crops, the stevia was a real slow grower. By early April I only had three tiny plants to transplant into small pots. They looked pretty iffy but they hung in there and made some growth by the time all the plants made the big move into the garden the end of May. I put the three small seedlings at the far end of a plot, with care but also a bit of doubt as to their surviving.

Well, they not only survived, they thrived. We had an unusually long, hot summer and did they love that. They got the usual care, mulch and a few words of encouragement but not anything special. To my surprise they grew healthy, hearty and strong - an attractive well leafed light green plant. Unfortunately I didn’t take a photo of them in all their glory. They don’t stand out a lot, just quite nice. Every once in awhile I’d pick a little piece of leaf for a nibble. It was such a strange sensation to see this green leaf and expect some sort of "leaf" flavor but instead get a very, very sweet taste. Even if I didn’t do anything else I figured that it was a success -- a bit of fun in the garden.

In early September they were about two feet tall and almost as wide. The trio filled up their 4 ft of space quite well without being too crowded. I picked the largest leaves to dry and got quite a harvest from just those three plants. I left quite a bit of growth to keep feeding the roots in the chance they might make it through the winter, though most reports say that isn’t likely with our cold winters.

Articles often compare growing stevia to growing basil, a plant that starts wilting if one even mentions the chance of frost, no matter how light. Well, early September was very warm but soon cooled off with a number of light frosts in the 30 degree range. I harvested a last large picking of basil (they also loved the unusually hot summer) before those frosts finished it off. But the stevia plants weren’t fazed in the least; they just kept growing.

stevia plant greenhouseTowards the end of September I cut the still green plants down to about 7", hanging the much leafed cuttings in the house to dry. More harvest. The plants regrew. A harder frost of 27 degrees didn’t cause any damage. But I decided to pot up one of the plants to overwinter in the greenhouse before it got any colder. I had to cut off a LOT of root to do so, snugging it into a 10" inch clay pot. It moved into the greenhouse in mid October in good form before the temps fell into the teens. A hard freeze did finally put the outside stevia plants into winter dormant mode but they are obviously of much hardier stock than basil.

Surprisingly, the butchered roots and rather rude transplant into a pot didn’t seem to affect the greenhouse plant at all. No lost leaves, no yellowing, no wilting in spite of losing probably half its roots. It did have a few flower buds that I nipped off and it continued with some more growth. At the end of December it was still alive and I’ve harvested a leaf now and then to put in tea or dinner. But now in mid January it is starting to look like it’s ready for a rest with some browning/yellowing of some leaves. It’s time to ease off on watering and let it hibernate. We’ve had some significant below zero cold spells this month and the greenhouse is often near freezing. It will be quite interesting to see how this one does and if the overwintered plants in the garden survive. That’s asking quite a bit of a plant native to Brazil and Paraguay! I plan to start new plants from seed in the spring anyway.

HARVEST - Now back to all those drying leaves. It was a much larger harvest than I expected. The leaves stayed nicely green (many herbs, including basil, darken when dried, even air-dried as mine are). I ground them to a powder with a steel-bur mill and got a full pint of finely powdered herb. There is no doubt that stevia has a taste of its own but we both like it. I don’t consider it a substitute for sugar, just another option. Since we don’t use white sugar (except in wine) we’re used to stronger tasting sweeteners anyway -- Sucanet, honey, maple syrup.

The dried powder is easy and handy to add to morning oatmeal/fruit sauce, or plain applesauce, yoghurt if it's the non-sweetened kind. I used many fresh leaves in tomatoes when canning them and also for sweetening grape juice (steam processed). It worked well for both and I’ll probably make more use of it fresh next year. The biggest challenge I’ve had is guesstimating how much is enough. You definitely don’t want to overdo it. So I add a small amount, then taste, then add more if needed. I particularly like the flavor in tomato dishes and other meals that need just a bit of sweetening without a sugar taste. I’m beginning to get a feel for how much is enough and have started replacing half the honey or Sucanet in cookies with stevia. It's a winner there, too. I'll have to grow more though to use it that way often.

There is a bit of a down side to home-grown ground stevia. There’s no getting around that it is ‘green’. It just plain looks a little, well, strange, on your oatmeal or applesauce. But one gets used to it. Add some cinnamon and it just blends to a slightly different, and tasty, shade of brown. We are used to brown Sucanet so it’s not really all that much different, and I tend to think very light colored applesauce is a bit suspect anyway. Sort of like white bread when you’re used to whole grain.

So stevia was a surprisingly easy and successful trial here on the homestead. It won’t replace sugar (or Sucanet in our case) or honey but it doesn’t have to. It can just be itself, and I appreciate it as it is.


The 2018-19 overwintered plant (above article) did OK when transplanted out in the garden though it wasn't as robust as the new seedlings, so mid-July I cut it back and it regrew fine. The season was cooler with a wet end of summer and the plants reflected their desire for more heat. They grew and I got a harvest; it just wasn't as big as the previous year.

The winter of 2019-20 I again overwintered a plant in the greenhouse and it did well. Plants left in the garden both years died. The summer of 2020 was a record season of long and hot, with temps in the low 80's common which is quite unusual for us cold blooded Yoopers! We sweltered but the Stevia loved it! In early August the robust plants started flowering, especially the one overwintered/replanted. I harvested the 6 plants down to the bottom leaves. They regrew. I harvest all large leaves in early September. Then the end of Sept. the final harvest, cutting them all down. When dried and ground I had 1 3/4 cups Stevia powder. This year's result was stronger flavored than the last two years. Though later in the winter it had mellowed some.

Mid-October I dug up four of the Stevia roots to transplant to the greenhouse bed when moving things in for the winter. To my surprise, and probably his even greater surprise, a guest came in with one of the Stevia plants. Here's the story:

October 14, 2020

When I was lifting one of the Stevia clumps into its new home in the bed some of the dirt fell off and out fell a small toad! He had likely dug himself down into the dirt for the winter and I'm sure this was quite an unwelcome rude awakening. He is about 1 1/2 inches and a pretty black-white-gray coloring. I quickly moved him under a recently transplanted parsley with the hopes he will dig down and re-establish his winter quarters and get back to sleep. It won't be as cold as out in the garden, but hopefully to his liking. 

Addendum:  It's 8:00 pm and I just went out in the greenhouse with a flashlight to close the insulated front curtain. Might as well keep some of that daytime heat in. As I walked out I quickly shined the light at the parsley at this end and there perched on a leaf was the little toad, quite wide awake! I quickly turned the flashlight away out of his eyes. I'm sure I moved in plenty of earthworms and likely other garden insects with the plants but whether there is enough to feed a small toad I don't know. I'll have to do some research. I may have to move him back out to the cold, but natural habitat, garden. Though I certainly wouldn't mind having a companion toad out there, if he might enjoy it.

October 15, 2020 -- "Toad" update

Off and on during the night I thought about the toad - would he get in the mousetrap (livetrap), would he jump off the bed (falling on the very hard stone floor), was there enough for him to eat, should I have put out a dish of water, should I put him back outside ... A litany that did no one any good! In the morning I went right into the shop and shined a light through the tree frog on watering canwindow into the greenhouse and there he was, sitting on the wood sill near the parsley, looking east out the window, waiting for the sun to come up? I went out to talk to him about moving back to the garden. When I stepped into the greenhouse he hopped up on the side of the nearby small plastic watering can, having no trouble hanging on. Oh... Steve came out just then with the comment that toads don't do that. Yeah, I know. My only excuse is that I expected a toad and never looked any closer (though you'd think the coloring would have given me a clue!). I've seen a lot of toads in the garden but never a tree frog. It didn't occur to me that one might decide to hibernate there, though it certainly is easy digging. But Tree Frog he/she certainly is, and a handsome cute one at that. Obviously quite awake I quickly scooped him up as he hopped to the top of the watering can and I worried he might hop into the water. We headed out to the garden and I set him down in the newly planted garlic patch with lots of mulch, freshly dug soft dirt, and no one digging in there until next fall. He calmly hopped off my hand, in no big hurry, and surveyed his newest surroundings. Thankfully there is plenty of time for him to re-hibernate before the really cold weather sets in. I think we'll both sleep better tonight.

Back in the greenhouse ...

In a month or two those four plants started regrowing and had small leaves most of the winter. In the spring they started growing in earnest and when the sun was no longer hitting the back of the bed by the house where they were I transplanted them to the largest clay pots I had so they could move nearer the windows. They are doing fine but I think next year I'll transplant them from the garden right into larger pots and just sink the pots in the bed so there is less root trauma. Though I can't say as they've shown any sign of stress. It is just the end of April now so it is probably six weeks before they can safely go out in the garden (we're still having freezing nights). But they seem to be enjoying spring right where they are, and I can enjoy a sweet nibble now and then when working in the fast growing greenhouse.

stevia plants in greenhouse April



 


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Have you read  "Frost Dancing - Tips from a Northern Gardener" ? A fun short read.

or "Homesteading Adventures"    Creating our backwoods homestead--the first 20 years.

and "Growing Berries for Food and Fun"   A journey you can use in your own garden.

updated 10/06/2019

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