I promise I’ll post something more substantial today…but I had to pass this email message along that I received this morning. Way to go colleagues and commenters!
Your new weblog, the Garden Professors, is an impressive piece of work! I plugged it today in the consumer horticulture CoP blog [http://www.consumerhortcop.wordpress.com].
National Program Leader (Ag Homeland Security)
I should add “in absentia”… Played hooky from the convention center Thursday afternoon for a trip out to Plant Delights Nursery, Inc. with my former grad student and plant geek extraordinaire, Paul Westervelt. We followed proper Plant Delights etiquette: you make an appointment to visit at a time other than open house or tour. I teach herbaceous landscape plant i.d. as well as ornamental plant production courses, and take every opportunity to bring back images of new technology, growing systems, and great plants to my students. Since Paul is a now a grower for a large nursery, he’s also keen to learn anything he can.
We certainly didn’t go to shop [“She lies!”].
Tony amongst the yucca pups.
Even though we arrived a good hour before our appointed time (we were…excited), and even though a throng of 500+ salivating conference attendees were to besiege him and his staff the next day, owner Tony Avent very kindly made time to give Paul and me a personal tour of the back 40: where the real action is. Tony patiently answered our gazillion questions and filled our pockets with seeds. The propagation houses and trial areas have more amazing plants than you can shake a stick at. Many are one-of-kind hybrids or species. The vast Colocasia trials actually gave me goose bumps – alas, no photos were allowed. A walk through the display and trial gardens (Juniper Level Botanic Garden), resulted in several trips back through the retail houses to find that OMG! plant we just saw. We topped our visit off with the purchase of way too many yummy plants. Delightful, indeed!
The trial and breeding collection of Epimedium species and hybrids. Who knew there were that many???
North Carolina or Hawaii?? That’s Colocasia ‘Diamond Head’.
I’m in an Agave/Yucca phase and this isn’t helping a bit.
Paul demonstrates “The Joy of Plant Shopping”.
[Disclaimer: I do not endorse any particular product over another, nor do I receive ANY compensation (darn it), free stuff, etc. from any companies, whether recommending or dissing their product.]
Seeing Linda’s favorite mulch fork prompted this post – scroll on down past the Great Root Debate (rowr)! I remember first laying eyes on this beauty at a local garden center…shiny stainless steel,comfy chartreuse handle, large step area, nice and solid…”I must have eet!” But it’s the functionality that makes me reach for it every weekend. I’m tall (6′) and was a bit concerned that the short handle would compromise my leverage. Not the case! The round handle allows you to grip it most anywhere, reducing repetitive stress on wrist, elbow, and shoulder joints. The unique tapered blade – probably 5″ across at the tip – make it perfect for working around established plantings, removing king-sized gobs of crabgrass, and ideal for planting 1 gallon or smaller perennials or annuals. I must have dug 400 holes in the frenzy of planting that followed our agreeing (idiots!!!) to be on the local garden tour this summer. But I was darn comfortable and stylish while doing it. These puppies have been on the market for a few years, so this may not be news to you. But I just had to share my affection – two thumbs up. Wish they made a mulch fork!
As some of you know, my background is somewhat different from most faculty members in Horticulture in that my roots (no pun intended) are deepest in forestry. I’m sometimes asked to compare and contrast various aspects of horticulture and forestry. There are certainly differences – some of which I’ll get into in later posts – but there are also a lot of similarities. One of the truisms that seems to pervade both fields goes something like this: “When all else fails, blame the nursery”. Whenever a tree dies, whether it’s a 2-0 bare-root seedling or a tree that was spaded in with 60” tree space, the first reactions is “Must’ve been bad nursery stock”. Um, could it have been that the tree planting crew left the bundle of seedlings in the 90 degree sun all afternoon or that 5” caliper red oak really doesn’t belong in a bathtub? I bring this up because often we see suspicion, if not downright hostility, aimed at landscape nurseries. I thought of this as I was touring J. Frank Schmidt and Sons nursery this week near Boring, Oregon (yes, there really is town called Boring). J. Frank Schmidt and Sons is one of the largest wholesale producers of shade trees in the country. If you walk into virtually any garden in the northern half of the US, chances are you will see trees that began their life in the Schmidt’s fields under the shadow of Mt. Hood. J. Frank Schmidt nursery is among the most progressive nurseries in the industry, investing in new plant development, in-house research, and supporting university research through the J. Frank Schmidt Family Foundation and donating thousands of trees for research trials. During the tour, our host. Jim Ord, was excited to show us an air-slit container that Schmidt had developed for to reduce circling roots in container-grown trees. As I mentioned at the outset, we are often quick to blame nurseries for causing problems, here’s an example of a nursery working to solve problems. And this is just one example, Schmidt and other nurseries are working to develop and promote new elms and other species to provide a wider array of trees to replace ash trees in the wake of the Emerald Ash Borer. In some ways Schmidt is unique due its size and progressive stance but other ways it is very similar to a large majority of wholesale nurseries which with I interact. While there are certainly issues that trace their roots to problems in nursery production, most nurseries take great pride in their products and work constantly to refine and improve their growing techniques.
Urban environments are always challenging for landscape plants just because they are anything but “natural.” Temperatures are higher, water is often less available, and compacted soils have all the nourishing qualities of concrete. The single most important thing you can do to ensure long-term success of landscape trees and shrubs is to get their roots well established in the soil.
I’m going to leave the topic of soil amendments to another day (but you can find my myth columns about them at http://www.theinformedgardener.com under “Horticultural Myths”). What I want to focus on is our propensity for fertilizing landscape trees and shrubs without really knowing why, or when, or if we should be adding any particular plant nutrient.
The smartest $13 you can spend is to have a soil analysis done before you add anything to your soil. My favorite soil testing lab is the University of Massachusetts at Amherst. That $13 will buy you a complete standard analysis of the available nutrients in the soil, plus a measurement of the soil’s organic matter content. Of course, there are many other soil testing labs you can use, but UM’s Amherst lab is only providing you with information – not a sales pitch for amendments and fertilizers.
Why is this so important? Let’s say you go to a nutritional supplement store, buy every possible supplement, and take them all. Do you need all of these? Probably not. It would be smarter to talk to your doctor and find out what you’re missing, right? It’s the same with your soils. Don’t assume your soil needs a lot of phosphorus, even though transplant fertilizers are loaded with this element. Non-agricultural soils often contain abundant levels of this nutrient, and too much phosphorus will hurt mycorrhizae and contribute to water pollution. Take a look at this portion of a soil test for an organic demonstration garden:
Figure 1. Note the high level of organic material in this soil, which contributes to the nutrient overload.
The trick to fertilizing landscape soils is understanding that landscape soils are not agricultural soils. You’re not harvesting crops (an activity that depletes the soil of its plant nutrients). Urban landscape soils usually have high enough levels of most nutrients to sustain plant growth. But you’ll never know unless you have your soils tested.
A big “score” at a great garden center or nursery results in guilt. Not about the money I spent, but the giant pile of pots and tags left in the wake of the planting frenzy. I plan to provide a more thorough review/discussion on this topic in the future – but for now, I want to share what I learned in a visit to the Missouri Botanical Garden’s (MOBOT) recycling center in St. Louis (part of the Perennial Plant Association’s annual conference). As one of the public gardening world’s leaders in conservation and sustainability, their program is truly revolutionary and apparently very successful. In place since 2006, they’ve kept hundreds of thousands of pots out of the landfill.
Dr. Steve Cline,recycling guru and dynamic Director of MOBOT’s Kemper Center for Home Gardening, explains the system to our group.
Start with your basic pile o’ pots, knocking out loose soil, beer bottles, whatever they’ve accumulated.
Deliver them to either a participating garden center (there are several) or the garden’s recycling location and place in the appropriate bin.
If off site, pots get hauled to the garden’s Monsanto Center for recycling. Garden staff and volunteers then send them off to the great and loud Pot Chipper in the Sky…
resulting in pot confetti…
…which gets shipped to manufacturers of cool things like plastic lumber!
Voila. Guilt relieved; IF you garden in the greater St. Louis area. I’ll be talking about alternatives for the rest of us in a future post!