“Can I use manure to fertilize my garden?” That’s a common question we get in Extension and on the Garden Professors page. The answer is absolutely, but there’s a “but” that should follow that answer that not everyone shares. And that is…but for fruits and vegetable gardens the manure you apply could be a potential source of human pathogens that could make you or your family sick. There are procedures and waiting periods you should follow to reduce the potential risk to human health from pathogens in manure and other animal products.”… Continue reading this article “The Scoop on Poop: Manure in the Vegetable Garden (and potential food safety risks)”
Rethinking the monocultural lawn (again)
Over the last couple of weeks I’ve been in London having some unforgettable garden experiences. Thanks to the generosity of my UK colleagues Glynn Percival and Jon Banks I was treated to Kew Gardens, RHS Wisley Gardens, and Windsor Castle. I hope to construct several blog posts from these visits, but today’s post is an homage to the English garden meadow. Instead of monocultural turf lawns, mowed and sprayed into submission, why not consider a more biodiverse and visually pleasing approach to groundcover?… Continue reading this article “Rethinking the monocultural lawn (again)”
Understanding the mysteries of plant diseases: Prevention, Control and Cure (Part 3 of 3 in this blog series)
Understanding the mysteries of plant diseases: Prevention, Control and Cure (Part 3 of 3 in this blog series)
What next?
You’ve done your research and made a diagnosis—now what? Sometimes the plant has to be removed and never planted there again. Start over, do something else.
Controlling plant pathogens or abiotic disorders can be daunting, frustrating, even impossible. As I mentioned in the last blog early detection gives more options for control because the disease has not advanced to a degree where it can not be controlled.… Continue reading this article “Understanding the mysteries of plant diseases: Prevention, Control and Cure (Part 3 of 3 in this blog series)”
Supplemental Lights for Home Seed Starting and Indoor Growing: Some Considerations
Whether you’ve already got seedlings growing away or getting ready to start your annual indoor seed starting, one of the important factors in seed starting is light. (Last month I covered heat, which you can see here). Questions like “Do I need to use supplemental light or can I use a window?” and “What kind of light do I need to use?” are ones we often get from gardeners – new and seasoned alike. So I thought I’d take a little time to talk about light – the factors that are important for plant growth some ways that you can make sure you’re providing the right kinds and amounts of light to your new seedlings. … Continue reading this article “Supplemental Lights for Home Seed Starting and Indoor Growing: Some Considerations”
Is it good advice? Or is it CRAP?
In my educational seminars I’ve long shared a version of the CRAAP test (currency, relevance, authority, accuracy, and purpose) for analyzing information related to gardens and landscapes. My version is CRAP (credibility, relevance, accuracy, purpose), and we’ve published an Extension Manual that explains in detail how to apply it. This past week I was at the Philadelphia Flower Show participating in Bartlett’s Tree Care Update panel. Given that the theme of the show was “Flower Power,” I figured that a talk on Magical Mystery Cures was in order.… Continue reading this article “Is it good advice? Or is it CRAP?”
Feel the Heat: Temperature and Germination
In most parts of the country it is time to dust off the seed starting trays, pick out your favorite seeds, and get a little plant propagation going on. There’s definitely a lot of science (and perhaps a bit of art) to successful seed starting. While the process starts (and relies on) the imbibition of water, one of the biggest factors that affects the success, efficiency, and speed of seed germination and propagation is temperature. … Continue reading this article “Feel the Heat: Temperature and Germination”
Understanding mysteries of plant diseases: Diagnosis and Detection (Part 2 of 3 in this blog series)
Something is wrong?
Do you ever have a feeling that there is something wrong with a plant? It’s just not healthy looking, or it has not grown for awhile? As we discussed in the last blog, disease is a process–it occurs over time. When in the disease time-line you notice the process, can be quite varied. Some astute gardeners may know something is wrong before there are symptoms, others may not take notice of the process until the plant is dead.… Continue reading this article “Understanding mysteries of plant diseases: Diagnosis and Detection (Part 2 of 3 in this blog series)”
A Gardener’s Primer to Cold Hardiness, Part 2
Last week I discussed the mechanics of how cold hardy plants can survive temperatures far below freezing. Today we’ll consider the practical implications of this phenomenon and what, if anything, you can do to help your plants through cold snaps.
What happens when temperatures change at unusually high rates?
Remember, supercooling occurs when temperatures drop slowly, allowing water to leave living cells and freeze in the dead spaces between cells. When rates drop quickly, which can happen on sunny winter days once the sun goes down, water can freeze inside the cells before it has time to migrate into the extracellular space.… Continue reading this article “A Gardener’s Primer to Cold Hardiness, Part 2”
A Gardener’s Primer to Cold Hardiness, Part 1
With record low temperatures in some parts of the country, gardeners are understandably worried about the ability of their perennial and woody plants to survive the cold. What today’s post will do is give you some context for understanding how plants can survive temperatures far below freezing.
Why ice floats and how this damages cells
Everyone knows that ice floats, whether it’s an iceberg in the ocean or cubes in your favorite chilled beverage. Ice is lighter than water because its molecular structure is different: there is more space between water molecules in ice.… Continue reading this article “A Gardener’s Primer to Cold Hardiness, Part 1”
Compost in Seed Starting Mix: Recipe for Success….or Failure?
A recent question posted to the Garden Professors blog Facebook group (a place where you can join and join in conversation of garden science) asked about the potential for compost added to seed starting media to cause failure in germination. It is a good question, and one that seems to have several different camps – from garden hero author folks swearing by it in their (non-peer reviewed) books, to fact sheets saying it isn’t a good idea.… Continue reading this article “Compost in Seed Starting Mix: Recipe for Success….or Failure?”