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Food Preservation: Cold Storage

Carrot Harvest

The bulk of the food we store for winter we do so in cold storage, either in a cool room in the house or in our root cellar. Most of the work filling those spaces happens late in the season, so it is one of my last entries on food preservation methods despite how important it is to us.

The beauty of this ancient technique is that there is no electrical energy needed. No boiling water, no heating element, no freezer. Instead it uses the stable temperature of the ground and the colder times of year to extend the lives of veggies and fruits that already tend towards longevity after picking. For us, these are: garlic, potatoes, winter squash, pears, apples and roots (carrots, parsnips, beets).

What it does require from us, is choosing varieties that are known to keep well, appropriate spaces, and some care in how we handle and pack the produce. A cool room or closet in a house works great for some items. Others need a lower temp along with a moist environment like a root cellar provides. Basement root cellars can be made reasonably easily and cheaply and are right there in your house. We do not have a basement, so we had to do the slower, harder work of creating an outdoor root cellar.

In-Home Cool/Cold Storage

First, let me tell you about the foods we are able to preserve in our house. Because building our root cellar took years, even foods that I thought needed that real root cellar I went ahead and tried in the house. A number of these worked better than I expected. Plus, I (and the cats) can protect foods inside better from rodents – an important bonus!

Garlic – Garlic is harvested in late July, then cured on our breezy porch until the leaves all die. I trim them up, weigh and label them, put them in paper bags and move them downstairs to a dark, somewhat cooler closet. I grow four different varieties of garlic and we eat them in the order of least long-lasting to most: Red Russian, Music, Phillips and NY Extra Hardy. They do not seem to be bothered by sitting in our non-air conditioned house through some heat in the late summer and fall, and the drier environment makes the house a better choice than the root cellar. With this system, we have garlic all the way into the next summer. By the time the NY Extra Hardy is starting to dry up or have brown spots, we are harvesting the next crop. We save our own garlic seed, too, so now are totally garlic independent! By the way, for a year’s supply of garlic to eat and seed garlic, I grow 120 heads.

Winter Squash, Stored Indoors

Winter Squash – Over the years, we have settled on some favorite kinds of winter squash out of the wide number of choices: Butternut, Delicata, Long Pie, Seminole and Long Island cheese. Lots of nice, sweet flesh, a reasonable size and long storage are three criteria I have used. Again, some last longer than others, with the Seminole being the best keepers – I have 5 here from Fall 2019, an experiment in seeing how long they will last. We grow a lot of winter squash because we also feed it to our animals over the winter months, especially to keep goats on the milking stand. This year our total was 749.5#. Since they like warmer and drier conditions than our root cellar, we have a storage room set up that they dominate this time of year. Harvest generally runs from September through October, or until the first frost. Then we “cure” them in a hot, humid spot (for us, a greenhouse) for 2 weeks to harden their skin. After curing, they come in to the cooler set up we have for them. I can keep an eye on them, pulling any showing signs of spoilage first.

Potatoes

I was not a huge fan of potatoes until we started growing them ourselves and thus could choose from an amazing array of colors and textures! Purple Magic Molly, red Amarosa, red/yellow Pinto, Adirondack Reds and Blues, to name a very few of the myriad of options available as seed potatoes. Potatoes aren’t simple to grow, there are a variety of challenges. They are loved by other critters, especially potato beetles and voles, and they are very sensitive to drought or even inconsistent rains. They need to be hilled, then dug/forked up, which takes more human strength and soil disturbance than any other crop I grow. But, in a good year, it is worth it! We’ve had yields as high as 20 to 1 (for every pound I planted we harvested 20 pounds). We dig them a couple of weeks after the green tops have died, then I sort them, unwashed, into “will store” and “use soon” piles. The ones in good condition I lay out in trays on a shelf and floor of a dark downstairs closet then cover them with paper bags. I have read conflicting advice on how to cure potatoes (so, I don’t really), perfect storage temperature and humidity. So, I just keep trying slightly different systems and seeing what happens. I estimate that they are generally around 55F, which is a bit too warm, and 60% humidity, which seems about right. Laying them out on trays takes up a lot of room, but really helps me keep an eye and pull any that are rotting and use the ones threatening to sprout first.

Fruit

Pome fruits – especially pears and apples – can last for months in cold storage.  In fact, most pears should ripen off the trees, but need the time inside to reach maturity.

Old, Untended Apple Tree Between Parking Lot and Road

I have not planted apples here, since I don’t like them enough to deal with all the diseases and pests they have. We have put in 8 pear trees but they are not old enough to bear yet. However, we have great success gleaning both these crops. The apples we bring home from untended trees in public places are completely organic, but often are low quality in terms of taste and pest damage. Our goats, however, have yet to reject a single one! And there’s always enough good fruit for us to make

Bella Guarding Apples

a batch of applesauce and many apple pies. Usually I can pick up drops from August until November and we’ll all be eating them into January. They are in buckets and trays in our cool lower floor which is closer to 50F rather than the ideal temps of 36F otherwise we could keep them even longer.

Pears are intended for us humans, although we share them with the goats. Laying them out in trays around 50F gives me about a month when they can ripen. During that time we eat them, make nice pear dishes (here’s a great one we found, just substituted in wheat flour and maple syrup), and do at least one round of canning and/or dehydrating to stretch the season. November is a time when I can heat canning water on the wood stove and am glad for the extra heat and moisture from either method.

Root Cellar

Our Root Cellar

When we bought a house without a true cellar (obviously we have a lower floor, but it is not situated under ground level), we knew we would have to put in extra work to achieve this sort of storage. There are many clever options for burying trash cans and coolers and even vehicles.

Inside the Root Cellar

But I wanted it to be convenient enough that we can actually use it, even as we get older. Having to dig snow and ice off and unbury it for access didn’t appeal to me. So, we hired a neighbor and his excavator to dig into the slope next to our house. Then, over the next few years, we took rocks from all over our property plus some concrete blocks we found and constructed the walls. A very robust roof was made, covered with a pool lining we found at the dump, and heaped over with soil. Perfecting the drainage, air flow and temperature regulation will continue, but it is working! It has never frozen, but we have some trouble keeping it cold enough. Again, we’ll keep learning about it as we live with it over time.

Packing Carrots for Storage

What we use it for is simple: roots! Carrots, beets, and parsnips so far. I make sure to pick varieties known for storage prowess, and need to time my planting so they are ready at the correct moment. Having carrots and beets ready to store in August isn’t helpful – the cellar isn’t cold enough and if I leave them in the ground, they might get too big and tough or be eaten up by voles.

I will continue to try other kinds of roots now that we have it, such as parsley root, winter radishes, skirret, and salsify.

I pack the roots in damp clean sand for storage. You don’t want treated, salted sand offered free at your dump. Maybe you have sand around your home you can dig up, or you can buy clean sand from a gravel pit. If you end up with rotted veggies, you’ll need to dig out and no longer use the material around those, but we are otherwise reusing sand. We let it dry out in the sun over the summer to keep microorganisms in check.

They biggest challenge is protecting against rodents. Currently, I am using old coolers that I picked up from the dump or Good Will which have some extra insulation to moderate temperature changes and I hope are too tough for critters to gnaw through.

With this system, we were eating our own roots up until May last time around. This year we had more trouble with our crop (the drought hindered germination and growth, and we had a late season vole problem) so likely will have eaten most before that late in Spring 2021.

I am pleased to be having so much success and continuing to develop our capacity for cold storage, a low-electricity, time-honored way of greatly extending our harvests into the least productive time of year.

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Food Preservation: Canning

August is Harvest Time Here in NH

I found it challenging this month to write about food preservation in the midst of multiple, converging US and world crises. However, this is a truth we always live with: at the end of the day, while so many large scale happenings shape the world, we still have to eat, and how we do that further influences the larger whole. So… back to food preservation!

When I started canning, it was considered weird. I would go to my local hardware store to ask for supplies and they would laugh, goodnaturedly, and say: “aren’t you a little young, by, say, 50 years, to be canning?” (I was in my 20s). Then they would have to special order whatever I needed. Now, there are whole sections of stores dedicated to canning, even grocery stores have at least bands and lids. It really made a comeback!

Compared to drying as a preservation method, canning is a modern invention. It’s development was largely inspired by war-time needs in Europe and then the US beginning 200 years ago. More recently it has been a way to store food in uncertain times when supply chains might break down or when people want economical ways of eating (versus going out to eat). Along the way, it has also become a great way for homesteaders to stock up on food when it is abundant for leaner times and to allow for local eating year-round. Here, that means canning in the summer for consumption the rest of the year.

Strawberries, a High PH Food

I exclusively practice water bath canning which is simpler than pressure canning but can only be used with high-acid foods and recipes. That includes most fruits and tomatoes, plus veggies in vinegar solutions.

Botulism is the big concern when canning. Clostridium botulinum spores are all over the place causing us no problems, but when they grow a toxin is produced. Canning works by creating an environment without oxygen, which most microorganisms cannot live in. However, botulism actually needs to have low oxygen to thrive. The heat level in a water bath canner or by boiling the food ahead of time is not enough to kill the spores, so choosing food with enough acidity to stop spore growth is critical.  The high acidity (which means a low ph) doesn’t kill Clostridium botulinum but it stops it from growing, thus no toxin is produced.

There are also mixed reports about whether or not sugar helps prevent botulism. White sugar has a neutral ph, so that doesn’t help. I personally would not depend on sugar to stop botulism. I also don’t eat processed white sugar, so have only used honey when making jams and jellies that call for extra sweetener, following recipes from Pomona’s Pectin. Again, it’s choosing high acid foods that provides the check on botulism.

What’s tricky about botulism is that there isn’t an obvious bad smell or visual clue that it has grown. With all other methods of preserving, it’s obvious when it’s gone wrong. That inability to know through our own senses is kind of creepy and turns folks off from trying. To me, it just means that I take seriously the recommendations and recipes provided.

The USDA’s National Center for Home Food Preservation is a great resource for “research based” recipes and information so you can be sure you are canning safely.

Beyond safety, research continues to find that canning is a good way to keep nutrition and make it bio-available.

To get started there is some equipment needed. The investment is very much worth it if you like it and do it for years. You’ll need: a big pot to cook in, another big pot with a canning rack inserted to hold the jars, canning jars, lids and bands, a timer, plus a set of helpful tools that might not be necessary but are worth getting: wide-mouth funnel, ladle, jar lifter, magnetic lid lifter, and bubble popper/head space measurer.

Cooking Peaches

For the bulk of my canning, I cook fruits like peaches, blueberries or strawberries in their own juices (I start with a little water to cover the bottom of the pot to keep it from burning initially) and can them from there. The peaches are sweet enough to eat straight from the can as one of my favorite winter-time desserts. I also add the peaches and berries to yogurt smoothies that I make and can add some honey then if I feel it needs it. I generally aim for 75 quarts of canned fruit a year. I often end up with extra juice after processing, so turn that into smaller jars of jelly. I make my jam and jelly with Pomona’s Pectin which has honey sweetened recipes included. 

Canned Peaches

One of Our Peach Tress

A few notes on peach canning, which I have done a lot of: I slice them but I do not bother to peel the peaches. If they are not organic, I do wash them in a baking soda solution. If you have any land, I highly recommend growing your own peaches. It’s very difficult to grow them to look good enough for market without a lot of chemical treatments, but you can grow them for yourself organically and you will not mind the cosmetic imperfections once you taste them! It has lately been shown that white peaches may not be acidic enough for safe canning, so stick to the orange varieties. I dry my white peaches instead – yum!

My biggest complaint with canning is that I am boiling a lot of water during the hot summertime making the house less comfortable. Some folks actually have outdoor kitchens for canning, but I have not gone that far. There are some items such as blueberries that I will freeze as I pick them, then wait until it cools down in the fall to process them.

The reason it is worth going through all the work is that you end up with a great, ready to use, shelf-stable for a year or more product which I don’t have to worry about in power outages. Plus, opening a can of peaches in January is like experiencing a little bit of summer when I really need it!

Canned Peaches

Canned Peaches, Full of Summer!

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Food Preservation: Nutrition

I have practiced food preservation for years, loving how it helps me eat local food year-round and practice permaculture principle 2: Catch and Store Energy. Writing more about preserving was already my plan before we entered this new coronavirus world of social distancing and grocery store shortages. Now, it seems even more relevant.

Our July 2019 Veggie Garden

I don’t think we are in great danger of running out of food. But, I do think the safety of shorter supply chains and of avoiding stores is appealing, the health benefits from real, nutritious foods can only help us, and that people taking stock of what they truly need and rely on is leading to a new appreciation of food

A Few of my Favorite Seed & Plant Catalogs

growing. Seed sales are booming, CSA memberships are selling out, and garden plots are in demand. It follows that soon, how to use and save what is grown will be the question.

Before looking at specific techniques for preserving in detail, I want to address the issue of possible nutrient loss in preserved foods.

The belief that raw plant foods are ideal is currently popular. I was taught differently. Years ago, driven by my own health problems and by environmental and ethical concerns, I researched human nutrition and experimented with a number of different diets. I can say that vegan, low-fat, and raw veggie diets only further worsened my health. But, along the way, I was lucky to discover some people who helped me learn and make choices that have served me well, especially brilliant Wise Woman Susun Weed, and The Weston A. Price Foundation.

I learned that animal products are generally best raw but not plants. Plants treated in some way to break their tough cell walls makes the nutrients, especially minerals, that they contain much more accessible to their animal consumers (that includes human animals). This is supported by looking back at how our ancestors ate, and at current research.

Plant Cell Walls

Cabbage

The basic idea is that the thick cell walls of plants hold in the nutrition we need.

Our teeth cannot break the cell walls, and our digestive juices are not strong enough to do so either. We didn’t evolve an internal cooking (fermenting) system, like ruminants have, so, if we want to get value out of plant foods external “cooking” methods become necessary.

When I say “cooking” what I am referring to are any ways that break those cell walls. Heat is one way – roasting, baking, grilling, etc. Other options are freezing, drying, lacto-fermenting, and covering in oil or vinegar (think salad dressing). You can actually see this process happen, when a crisp bright piece of kale turns limp and dark in your soup, when the lettuce starts to look weird and slimy sitting in the dressing a long time, when your frozen blueberries warm up and, well, are just not the same as fresh. These are all clues that you can now really benefit from eating these!

Carrots, filled with carotenoids!

Minerals & Vitamins

Minerals are elemental rocks which can have different forms but can’t be destroyed by anything in your kitchen.

Vitamins, especially antioxidants, are often enhanced by cooking. Research has shown this with lycopene, carotenoids and ferulic acid. Vitamin C is a less stable compound so will break down more easily, with heat, exposure to light or time. However, Vitamin C is in a lot of plant foods – not just citrus – and much does remain after cooking.

Cooking In Water

One reason people became worried that cooking meant less nutrition may be because of this fact: if you heat a plant in water, the freed nutrients can leach into the water. If you are a drinker of Nourishing Herbal Infusions you will also understand this, as we rely on the long, hot water treatment of the herbs to move those compounds into the water. Here’s the key – the nutrients haven’t been destroyed but transferred into the liquid. That’s why for herbal infusions we squeeze out the herbs and compost them then drink

Braising Garden Veggies

the liquid only. If you boil veggies and throw out the water – yeah, you’ve wasted a lot. So make sure not to do that! We prefer oven roasting in olive oil, and also braising on the stove top with oil and a little water. Whatever liquid is left we make sure to ingest as well.

What About Enzymes?

Dr. Pottenger’s research did show that the enzymes in raw meat and raw milk aid our digestive process, which is why raw milk is more easily digestible. However, the enzymes in fruits and veggies are mostly destroyed by our own bodies because we don’t need them.

Elderberries in the kitchen

Safety

There are a number of constituents found in plants that are toxic or anti-nutritional to us which cooking deactivate, like oxalic acid in spinach, and cyanide-inducing glycosides in elderberry and phytohaemagglutinin in kidney beans.

Uncooked veggies aren’t useless to us – we get fiber, and some of the vitamins and minerals they contain. But at a time when we are worried about feeding the world and many well fed people have specific deficiencies, it seems we should try to get the most we can from what we eat.

Harvest!

The good news in terms of food preservation is that most of these techniques also offer us more bio-available nutrition. The research shows that some methods of cooking and of preserving keep certain nutrients better than others which is an argument for a diversity of tactics. In my next posts I’ll go over the varied options we have for keeping our harvests year-round.

I do know that there are wildly differing opinions, experiences and even conflicting research results out there.  I’ve shared here my own experience and what I learned from people I trust for you to consider and make your own best choices for yourself!

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