Month: February 2012

Why don’t landscape trees respond to fertilization?

As part of my ‘other duties as assigned’, I have taken on an assignment to develop fertilizer prescriptions for landscape trees and shrubs based on soil samples submitted by homeowners to the MSU soils lab.  This has gotten me immersed in two sets of conflicting literature. 

On one hand is a raft of extension bulletins and ISA guidelines on tree fertilization, which typically suggest adding 2-4 lbs of nitrogen (N) per 1,000 sq ft of ground area – in some cases up to 6 lbs of N per 1,000 sq ft (Rose 1999). … Continue reading this article “Why don’t landscape trees respond to fertilization?”

[Return of] National Forced Affection Day

After several incredibly informative posts from Jeff, Bert, and Linda, I’m going to give you a break as I veer off into Useless-land.

I’ve written posts previously regarding how important Valentine’s Day is for floriculture, most obviously the cut flower growers and florists.  In past posts, I’ve suggested alternatives to the boring/overpriced/under-fragranced/outsourced bouquet of red roses that folks seem to gravitate to.   The National Retail Federation predicts record-breaking sales in excess of $17 billion this year; $1.8 billion will be spent on cut flowers.… Continue reading this article “[Return of] National Forced Affection Day”

Our visiting professor digs into tomato planting depth

With Ray’s recent photos of the peach, crabapple, and hydrangea planted too deeply, a discussion of tomato planting depth arose in the comments. I’ve seen the prolific adventitious roots start to form near the base of tomato plants, and I plant tomatoes to the cotyledon or deeper, but tomato planting depth not an area I have extensive research experience in. So I did a little literature search.

It seems that the practice of planting tomatoes is more than just friendly garden folklore.… Continue reading this article “Our visiting professor digs into tomato planting depth”

Mulch: Just Do It

A follow-up to Linda’s post about a recent study in Arboriculture and Urban Forestry that indicated mulch may not reduce evaporation of water from soil as we generally assume and which suggested that landscapers may want to re-evaluate their mulching practices.  As Linda noted, we have some real concerns about this conclusion and believe that proper mulching of landscape trees and shrubs has well-established benefits.

First, I don’t question the results present in AUF article.  As my grad students frequently hear me say, the data are the data. … Continue reading this article “Mulch: Just Do It”

Stupid plant tricks

Blog reader Ray sent these photos of his weeping peach, weeping crabapple, and a Hydrangea paniculata, along with this comment:

    

“When a tomato grower extrapolates his applied knowledge to his landscape, before learning otherwise.”

(Translation for those tomato avoiders like me:  they are all planted too deeply, which tomatoes like.  Trees and shrubs, not so much.)

If It’s In The Wall Street Joural Opinions Section Then We Need to Rethink Everything.

I’m no global warming apologist.  I do think it’s happening.  I think the new USDA map supports that it’s happening.  I also think that humans probably have something to do with it since we cut trees and burn fossil fuels which release carbon dioxide, a greenhouse gas, into our atmosphere.  That said, I’m not convinced that the carbon dioxide produced by people is as big a player in global warming as we’re being led to believe, or that the world is about to become a living hell because of it. … Continue reading this article “If It’s In The Wall Street Joural Opinions Section Then We Need to Rethink Everything.”

Stop planting things so close together, Holly!

I love Linda’s idea and there are some great comments – but y’all need to send her photo evidence of these gardening adventures/casualties to post! Would make me feel better. It doesn’t take much to get me going on dubious stuff I have done, gardening or otherwise.

Was just up to Northern Virginia to help with  Fairfax Master Gardener training (at the fabulous Merrifield Garden Center).  My talk was on "site analysis and plant selection." As I looked through my digital photos to illustrate the points made, I came across several "ahem" moments, that lead to the "do what I say, not what I do" caveat (but usually gets a few giggles and snorts). … Continue reading this article “Stop planting things so close together, Holly!”