One of the best organic fertilizers out there – at least in terms of how plants respond to it — is bat guano. As most of you probably already know, bat guano is made of bat droppings. What you probably don’t realize is that bat droppings need to be aged for a while in an arid environment before they become guano. Caves provide the perfect environment for this to occur, and so that is where most bat guano comes from.… Continue reading this article “Guano”
Month: February 2011
Blog Survey Results, Part 1
I was gently reminded last week that I never published the results of our survey, asking our readers for feedback on the first full year of posting on The Garden Professors. All four of us are extremely grateful to those of you that participated, as we could use this information in our annual reporting and reviews. Thank you all for taking the time.
To keep this from being too long for our blog, I’m going to just cover the first two questions today. … Continue reading this article “Blog Survey Results, Part 1”
The Hottest Thing in…Veg!
Vegetable transplants and herbs were a bright spot last year (and the one previous) for most retail growers and independent garden centers. Seed and transplant companies have taken note – saw lots of veg and herbs at the normally-ornamental trade shows. As always, some good ideas, some a bit far-fetched…

Pelleted lettuce seed (much easier to handle) mixes for the grower to create patio-size planters. Not bad! Snipping a few leaves will be fine, but if you eat salad more than once a month, you’re gonna need a bigger pot.… Continue reading this article “The Hottest Thing in…Veg!”
Girdling roots: The source of all evil in the world?
One of the most widely discussed topics in arboriculture and tree care these days is the problem of girdling roots. Virtually every conference or workshop on tree care has a speaker or speakers on how poor planting technique or poor nursery practices lead to girdling roots and their subsequent correlation with poor tree performance, tree failures, global warming, the soaring Federal budget deficit, and the batting average of the Seattle Mariners. Before we go any further let me state categorically that I do not think girdling roots are a good thing; nor do I think any of the consequences mentioned are a laughing matter – especially the Mariners’ batting average. … Continue reading this article “Girdling roots: The source of all evil in the world?”
Sudden Death Syndrome in Soy — Biggest Threat to the Entire Food Chain?
This past week we received an interesting e-mail about something called “sudden death syndrome” which we were asked to blog about. Here’s the article we were sent. We don’t always take requests, but we thought that this was an interesting one, so we decided to write a little post about it. Sudden death syndrome is basically a fungal disease which affects the roots of soybeans. Recently there has been some press out there about how Round-up ready soybeans are particularly susceptible to this disease and that the spraying of roundup itself can lead to favorable environments for it.… Continue reading this article “Sudden Death Syndrome in Soy — Biggest Threat to the Entire Food Chain?”
Should we use biochars in our gardens?
In the last few years, I’ve had a number of people ask me about biochar: what is it and what does it do? Should they add it to their garden? Should they make their own biochar? So while the subject deserves a longer review, I thought it would be useful to discuss it briefly on the blog.
In the strictest sense, “biochar” refers to charcoal that’s made as a byproduct of biofuel production. Various crop residues, livestock manures, and just about any other organic material you can imagine has been studied for this purpose. … Continue reading this article “Should we use biochars in our gardens?”
Valentine’s Day, yet again…
We make fun and call it “National Forced Affection Day” (NFAD) around
our house. But it’s big business.
The National Retail Federation did a survey of 8900+ consumers in their 2011 Valentine’s Day Consumer Intentions and Actions Survey They found that the
average person will shell out $116.21 on traditional Valentine’s Day merchandise this year, up 11 percent over last year’s $103.00. Men spend twice
as much as women. Total holiday spending is expected to reach $15.7 billion.… Continue reading this article “Valentine’s Day, yet again…”
Is local always better?
As those that have followed the blog for awhile are aware, among my pet peeves are some of the naïve statements that are repeated ad nauseam by proponents of native plants for landscaping. You know the usual litany: natives don’t need water, don’t need fertilizer, resistant to insects, resistant to diseases, yada, yada… According to the dogma, native plants possess these traits because they’ve evolved here and they belong here. I hasten to point out; I have nothing against natives and think we ought to plant more of them whenever they are an appropriate choice. … Continue reading this article “Is local always better?”
Friendly firs follow-up
Looks like I was too easy on you Friday! Most of the you correctly noted that this “devil’s fork” is most likely the result of topping by a human or nature:
Given that there are powerlines nearby, and more importantly a view to the water downhill, it’s likely that someone deliberately headed this Douglas fir (Pseudotsuga menziesii) back. On the other hand, this species will commonly lose branches, and often their leaders, in a windstorm.… Continue reading this article “Friendly firs follow-up”
Friday quiz – too close for comfort
Since Valentine’s Day is coming, today’s quiz features a situation that’s a little too close for comfort:

This is not the result of three trees being planted too closely together, either by a person or by nature. What is it the result of?
Answer and another picture on Monday!
