Products!

Just returned from a mega field trip across the state of Virginia with my Ornamental Plant Production & Marketing class. We toured major wholesale nurseries, greenhouses, and retail garden centers over the course of three days. The trip went well, I believe (university field trips are a considered a success if you return with the same number of students you left with).

One over-arching trend is, of course, that growers and retailers are going after the veg/fruit thing in a big way.… Continue reading this article “Products!”

Getting Loaded

Spring is off to a warm and fast start here in Michigan.  March was unseasonably warm and the past week or so has seen temperature 20 degrees above average or more.  Needless to say this is pushing all of our landscape trees and shrubs.  Forsythia and saucer magnolia are in full bloom, at least two weeks ahead of schedule.  The warm weather also has us scrambling to get some research projects in the ground as well.  … Continue reading this article “Getting Loaded”

Friday investigation – April Fools!

I didn’t exactly cheat on this one…but it was a mean trick nevertheless.

This is a contorted cultivar of Larix (can’t remember the exact name and I’m out of town this week), hence the twisty needles.  And indeed the tree is senescing.  The newer growth (the second flush of the season) just wasn’t as prepared for fall as the older growth, which is yellowing naturally.  So everything is just peachy with this tree.

Just goes to show you how important it is to know all the details when doing distance diagnosis!… Continue reading this article “Friday investigation – April Fools!”

Friday investigation

Today I’ve attached a photo of a conifer displaying two symptoms:  chlorosis of the older needles and a twisted appearance:

What do you think are the causes of these symptoms?  Answers on Monday!

Haber and Bosch

There are people who are fascinated by plants and people who are fascinated by the science of growing plants.  While I love plants I must confess that I consider myself to reside more firmly in the latter group that the former.  I do love to see the beautiful flowers on an apple tree in the spring, but I’m more fascinated by the nitrogen, phosphorus, potassium and other elements that the tree obtains from the soil.  I like to contemplate the complex ecosystem that surrounds the tree, including the tree’s pests and the possible things that we can do to protect the tree from pests. … Continue reading this article “Haber and Bosch”

Building healthy soils?

I love living in Seattle…but I’m getting increasingly impatient with the City’s “Building Healthy Soils” propaganda.  For years I’ve questioned their recommendation to perpetually amend landscape soil with organic material to no avail.  Let’s see what you all think of their “fact sheet” (which you can read here in its entirety).

“The best way to improve the soil is to add plenty of compost or other organic matter throughout the entire planting area before planting. Thoroughly mixing these materials deep into the soil helps provide water, air and nutrients to plant roots.”… Continue reading this article “Building healthy soils?”

Devious dandelions

As Austrian reader Johannes explained, the difference in dandelion flower height is due to herbivory – in this case from a lawnmower.  Dandelions are quite adaptable to variable environments (the phenotypic plasticity Johannes also mentioned) and flower heights will increase or decrease depending on these variables. This ensures that the flowers will be accessible to pollinators, yet not decapitated by lawnmowers.  It’s just one of the fascinating traits that make weeds successful!

 

A Taraxacum teaser

It’s spring and the dandelions are happy to see you!  I’ve taken photos of two groups of dandelions just footsteps away from one another. The populations are both in full sun, with similar types of soil and water availability. You’ll note that one group has very short flower stalks, while the second has longer stalks:

So what’s responsible for the difference in flower stalk length?  And for extra credit, what’s the scientific term for the phenomenon?… Continue reading this article “A Taraxacum teaser”

Age

This time of year is very exciting for the students in my plant propagation class because now is when they all get to try grafting.  In particular, they get to place buds from an apple tree onto a rootstock.  There is nothing like placing a bud from one tree onto another to make a person feel as though they’re a horticulturist (NOT HorticulturALIST — that’s not a real word).  Especially if that bud successfully grows on the plant where it was placed and produces a happy new tree — What a warm fuzzy feeling!… Continue reading this article “Age”

Pardon If You’ve Seen This Before…

But it still makes me smile.

First published in December 2005, it’s still up at Red Shirt Knitting.  Seattle yarn artist Erika’s story is posted, as is a chronological progression of photos and events since the original “fitting”. 

She actually got some pretty funny tree questions/comments about potential girdling, the possibility of damage from moisture buildup (I like her response “What are YOUR sweaters made from…neoprene?”), etc.

Tortured urban tree examples abound: poorly planted, pitifully pruned, and other horrors. … Continue reading this article “Pardon If You’ve Seen This Before…”