Tag Archive: grow


cottonwoods fallen budsCottonwoods seem to get a whole lot of bad press and not enough praise.  As soon as the fluff starts to fly in late spring/ early summer people seem to want to gripe about it. Oh sure, some do enjoy the warm season snow, delicate as goosedown, swirling, lofting and icing the sidewalks. It’s a little magical when the flurries are a-fly. I promise  it is not making you sneeze, it’s just what you see in front of you while other tree and grass pollens play merry hell with your sinuses. Cottonwood pollen is released long before the flurf flies- that’s actually the mature seed with a silken sail attached.

There’s also the abundant branch shedding, of course.  It’s not a tree for the obsessively tidy. It’s branching is abundant, even shaggy, and the wood snaps easily in high winds, leading to littered landscapes.  (But if you have a chipper, or are a wizard with the shears, lots of lovely ramial wood chips for soil improvement.)  It rots quickly and also makes great mushroom logs if you have larger diameter fallen branches to dispose of.

I notice when I look up cottonwood trees, everyone writes as if the local tree is ‘THE’ cottonwood.  In fact, it’s a large number of populus that people call “Cottonwood”. In the West coast of North America, my ‘hood, it’s Populus trichocarpa. Most widely distributed is Populus tremuloides (mainly Canada, but found as far south as central Mexico.) Populus deltoides mainly from the central and East USA, but a bit into the Southern Canadian prairies. Populus grandidentata in the East in a swoosh from the Great Lakes to the coast. There’s a whack of them. If you care to make a precise ID of your particular poplar (yes, I also mean cottonwood)- check the ranges. Google ‘Populus’ with your state or province and you should be able to figure out which one you’re looking at. It also hybridizes easily where ranges intersect- just to throw a curveball into your I.D.  It’s not limited to the Americas either- Europe and Asia have plenty of poplars, too.

All varieties can be used in much the same way, though, and while one variety might be medicinally superior, I don’t know which. I’d need a lab and USDA level access to fresh samples. The spring bud resin of any can be used to make a soothing anti-infammatory salve.  Also called Balm of Gilead, use of cottonwood bud salve is very old and very widespread- you can find it in Culpeper’s Compleat Herbal, Russian formulas using bear grease, the Salish peoples of the Pacific Northwest-essentially, everybody who has had access figured out this tree’s resin was a storehouse of medicinal power. Collecting windblown buds in early spring seems the epitome of ethical wildcrafting!cottonwood buds

Poplars grow fast. I guess you might need to, when your substrate is quite likely to shift without the stabilizing influence of your roots. They prefer moist soils, rivers and lakes in most varieties, but definitely abundant surface moisture when the seeds sprout, since they are viable only for a short time.  Water probably distributes as much seed and live material as the air filled with ‘snow’. My nearby Fraser River has large islands in the middle of it essentially made of cottonwoods alone, catching the suspended silt and sand. They shift position stealthily on dark nights…. well, maybe not that fast, but they do creep around. Cottonwood roots easily from dropped branches in spring, and sprouts vigorously from deer and beaver-girdled young trees, it’s a very vigorously alive tree.  Propagation is ridiculously simple.  A tilted log may become a mother of thousands.

The classic river or lakeside profile of the local cottonwood is crowded, shaggy, swoopy- classic cottonwood profilethe branches seem to sag under their own weight, and then optimistically rise up at the tips, almost making an ‘s’ with longer branches. When older, trunks grey and fissure, growing corky. When young they grow in gregarious groups, but are very shade intolerant trees, so tend to grow in groups of similar age.  Young seedlings soon expire in the heavy shade of abundant parent trees.

Cottonwoods can live a few hundred years- as much as 400, but usually don’t.  Typically cottonwoods succumb to rot, or undermining by water, or some other accident at 70-100. Living on riverbanks can be precarious.  They often break records for girth within their span, however.  The largest trees in both Manitoba and Saskatchewan are cottonwoods.

Early settlers would keep an eye out for cottonwood when travelling, as it’s presence indicated water.  They made frequent and widespread use of the fast growing tree for windbreaks, fenceposts, firewood and basketry. Wherever cottonwood is found, the people living among them have a history of use.  The Salish called it ‘The Tree of Life’, the Mojave people used it for practically everything one might use a tree for, the Hopi carved the roots into Kachina dolls. It’s a symbol of benevolent spirits and abundant life wherever it grows. The cambium is edible, and even tasty when the down is flying.cottonwoods branchy br

Other Uses

The wood of the tree itself isn’t as soft as the breakable branches might imply, and makes a very serviceable lumber. It’s fairly soft for making furniture with but oiling it helps prevent scratching and denting, and using it for things like trim or moldings is just fine. Since it grows so fast, that makes it quite a good choice for agroforestry projects. The trees can be coppiced for animal fodder. The wood holds inks unusually well, and makes excellent boxes and baskets, cut thin. Approved by the FDA for food containers and very workable, cottonwood also makes good bowls and cups. It’s light and ideal for models and children’s toys. As firewood it makes 16.8 million BTU’s per cord- not great, actually-but abundant! Cottonwood that has fallen as a result of rot smells a little funky though, so you might want to save that for outdoor fires.

Often thought of as a ‘waste’ tree, cottonwoods are in fact a storehouse of medicine, fast wood, wildlife support and great permaculture potential. See if you can find some at a river near you!

Fun Fact: Pando is a clonal colony of Populus tremuloides in Utah so big that it’s the heaviest (and at an estimated 80,000 years, one of the oldest) known organism.

It’s snowing again.

It’s been a rough winter here.  Yes, I know the rest of Canada is laughing at the West coast while we despair over a few measly snowfalls and a few weeks (on and off) under zero, but it’s driving us here in Lotus land crazy. We don’t know what to do with all this white stuff and it’s well past time to put in peas.

Hand in hand with the horror of repeated slushy meltdowns and extended freezes, goes dead plants.  In addition to the certainly dead and dishearteningly soft, there’s the ones we’re not really sure about yet, until new green shoots convince us that all hope is not lost. One after another pass inspected through my hands while I clean up the nursery, nicking the bark, looking for the glimmer of green that spells life. Bushes are frostburnt, newly planted perennials squashed into submission, tree limbs forlornly dangle after ice storms have had their way. It’s more than a little depressing.  I was wondering what to write about this month, while I would normally be lyrically inspired by the first of the spring bulbs and the imminence of cherry blossoms, right now I’m most inspired by the stuff I know isn’t dead.

The Haskaps.

How do I love thee, Haskap? Let me count the ways.  Firstly, cold hardiness. At the top of my list, presently, for obvious reasons.  Although we often have serious zone envy when it comes to more southerly regions, in the case of the Haskap the south envies us. The warmest USDA zone it can tolerate currently is zone 8, and that’s really pushing it. Most of the cultivars would prefer it much colder. To be really honest, they are not the best berry bush choice in my own zone 7, more of an interesting addition to the garden to provide season extension, as (reason to love it #2) it fruits earlier than almost anything else in the garden, sometimes even before strawberries. And you can grow it in zone 1! 1!! Haskap has been successfully grown in Moose Factory, which is an actual Canadian city name, I kid you not.  I also love it because it puts up with a huge variety of soils and plant combinations are virtually endless.

haskap-berry

‘Boreal Blizzard’ a new release from the University of Saskatchewan breeding program

The multiplicity of names is not helpful to the newbie. Haskap, Honeyberry, Blue Honeysuckle, Fly Honeysuckle (or swampfly honeysuckle, which makes me feel more than a little sorry for the people who named it.  I can imagine what boreal harvesting is like in a bog in the nice weather. Bug city.) It’s Lonicera caerulea, with a whole host of variety names depending on the origin of the plant and which botanist you’re speaking to. I defer to Haskap, for a few reasons.  The University of Saskatchewan breeding program, an invaluable source of information and stock, calls them that. The name Haskap is derived from the Ainu (the original inhabitants of Hokkaido) name for the berry. Honeyberry seems like a marketing trick, and calling it a honeysuckle just confuses people.

Named varieties are mostly  Russian and Japanese plants, or crosses of the two, but since it’s a circumboreal plant, there’s potential sources spread all around the northern world.

Cultivation

It prefers a cold, boreal climate (or at the warmest coastal temperate) and tends to grow wild in swampy areas.  I’m not saying that they should grow in low and saturated soil, but on a berm in said soil-yes. More on that from Dr. Bors of University of Saskatchewan here. Boreal chinampas, anyone? Keeping that in mind, some of the mildew issues that they can have I suspect are triggered by low soil moisture and planting should be sited carefully to keep water needs in mind. Shallow rooted plants can be fussy like that.  Haskaps are resentful of tillage as the roots naturally spread out quite wide and not deep, which should be just fine in a mixed garden, forest garden, or permaculture setting since we prefer no till methods anyway. pH is not much of a concern, which is promising for maximising your options- Haskaps tolerate from pH 5 to 8! In the wild, they will grow next to blueberries or cranberries and don’t seem to compete negatively with any specific plant family, so could potentially be worked into a number of plant guild combinations. They are tame things, and don’t self seed or sucker, and attractively blue-green and roundish when fully grown. LaHave farms in Nova Scotia has a great page with many more details on cultivation here .

Taste

220px-loniceraberrydiversity

The shape of different cultivars is hugely diverse

I want to be fair about this.  The taste of Haskap  berries is highly variable and often quite tart.  The brix is high in some cultivars, but always sweet-tart, and in the case of some, (usually the ones with more Russian parentage in them) a little bitter. Your response is going to depend a whole lot on your own sense of taste. They are truly complex tasting though, process beautifully, make amazing wine and juice.  As distinct as a black currants’ flavour is from red or white, the Haskap is not really like a blueberry or a raspberry, although the marketing would have you think so. It’s unique. If you only eat a few raw from one bush, you’re not really giving it a fair chance.  Haskaps should also be purple fleshed when ripe, not green inside.  They colour up nice and blue before they’re actually ripe so that can result in disappointment, too. It’s in the processing that they really shine, as the deep colour means it’s both pumped full of antioxidants and an effective food dye, and they seem skinless when cooked. It basically just dissolves, making fillings and jams smoother. Drying also enhances the flavour, and that’s the way the Japanese like to consume them. I had some in a yogurt that was practically transcendental.

Curious Tendencies

They have confusing pollination requirements. Haskaps do best when combined with other Haskaps that have different parentage but bloom at the same time. This is further complicated by growing the same plants in different climate zones where plant flowering may or may not overlap. There isn’t at present a comprehensive pollination chart of everything out there because commercial development is ongoing, widespread in multiple languages, and new varieties get released every year.  (Breeding with Haskap is actually fairly fast, because they can be started with fresh seed shortly after harvest and get to fruiting size quickly.) To further confound the issue, you have rebrandings and renamings. I saw Borealis being called ‘Mrs. Honeyberry’, and Aroura ‘Mr. Honeyberry’ by a local grower, confusing the issue unnecessarily.  Auroura and Borealis wasn’t obvious enough? Haskaps do not have separate sexes, they have perfect flowers.  They just apparently prefer an exotic stranger to a sibling. You’re really best to get multiple varieties if you have space to do so, if you don’t, then at least two intended as a pair. Planting strategies: U of Sk pollination strategy Chart for some of the most popular varieties: Pollination Chart Dr. Maxine Thompson’s varieties, with approximate bloom times here  I am working on consolidating information on Haskaps from the different breeding programs- they tend to have pollination charts on their own field material but not the intersection of plants from the other programs. You’re still best off hedging your bets trying several varieties at once! Then just get more of the ones you like and you’ll already have good cross pollination.

They can get mildewy.  As I mentioned, I suspect that they are sensitive to drought, and this may trigger mildew growth.  They also like going into dormancy early if stressed so may look like absolute hell in summer.  I know I’d like to recommend them as an edible ornamental but only if it’s not the feature. They are a pretty glaucous colour and bushy if grown in fertile soil, so you could– but if I were installing a foolproof, has to look perfect edible landscape, I probably wouldn’t.

Getting Some

Currently they are still on the trendy new plants lists and not widely understood. The pollination confusion doesn’t help, the fact that they go for exorbitant prices in northerly climates where they’re most needed (2 Gal pot goes for $25 in Edmonton, sheesh!) also doesn’t help, and people who buy fruit bushes for fresh eating in the garden were sold a raw bill of goods with slick marketing, incomplete information, and varieties that didn’t perform well in warmer climates. Early adopters may have bought ones where the flavour was distinctly meh.  Not encouraging.

But take heart! Breeders have been hard at work and if you are one of those in zone 5 or colder you can basically take your pick of varieties and likely do just fine. Due to the risk of an early bloom with no pollinators active, or refreeze after spring growth, people in zone 6 and up are probably best going with Dr. Maxine Thompson’s breeds which are tested in zone 8a and better suited to warmer zones with less risk of early emergence. Most retail garden centres by now have some Haskaps, although they may know nothing about them and you should do your own research if you want to ensure compatible pollination. Serious about getting a decent amount? You can order from LoveHoneyberry in the USA. For Canada there’s a list of propagators here

I want to thank Dr. Bob Bors, Dr. Maxine Thompson and Lidia Delafield for their dedication and hard work in improving Haskap varieties and extending the climate range possible to grow it in.