Q: My trees are being attacked by woodpeckers. What can I do and why are they suddenly doing this?
A: Sometimes, woodpeckers start drilling into trees for no discernable reason. Usually, though, they’re after insects they’ve detected within. So what you want to do now is try to figure out what type of insect has invaded your tree and treat the problem as quickly as possible. I would recommend contacting a tree service for this and, if you do this, be sure to hire a company that uses certified arborists. Trees add a lot of value and beauty to a home and someone who isn’t qualified to care for them may wind up doing more damage than good in the long run. If bugs aren’t the problem, try hanging pie tins, CDs or other shiny objects from the tree the woodpeckers after and they’ll probably move on.
When I wrote something on this topic last year about this time, I got a lot of questions from readers about different preservation methods. That’s why, this year, I’m focusing my column on freezing techniques. Of course, you’re always welcome to email me with any questions you have, too.
Freezing is one of the easiest ways to preserve herbs, vegetables and fruit. And though you hear talk to the contrary, most will keep well in the freezer for many months. The best time to harvest is in the morning because that’s when stems and leaves are in their best shape — not shriveled or dried out from the hot sun. Do your harvesting on the same day you’re going to freeze things because the longer fresh edibles sit on the counter, the less fresh they’ll taste when it comes time to use them.Read More»
Q: I want to keep out as many weeds as possible. Is landscape fabric a good choice?
A: Heavens no. Though you see this stuff used by professional landscape companies all the time, landscape fabric (also known as weed barrier cloth) should never be used in an area where you want to plant living things. Not only is it completely hideous (and some of it always winds up showing), it doesn’t allow water to penetrate the soil in the same way it would normally. It also prevents adequate oxygen from getting to plant roots where it’s needed. And just wait till the day you want to move a shrub or plant something new and you have to maneuver around that thick layer of yuck. If you want healthy plants, skip the landscape fabric and use mulch instead. Shredded hardwood is always a good choice, and there are several sites in Minneapolis where you can get it for free. Check out this website for a location near you: www.ci.minneapolis.mn.us/news/20030813mulchsites.asp. Shredded leaves and cocoa bean mulch also work well, particularly around annuals and perennials. It sounds like overkill, but mulch should really be 3- to 5-inches thick if it’s going to help prevent weeds and retain soil moisture.
Q: I have several zucchini plants, but they’re not producing fruit and the flowers are just falling off. Why is this happening?
A: I get this question a lot. It sounds like you’re suffering from a lack of pollinators. Zucchini plants have both male and female flowers and only the female flowers produce fruit. (Female flowers are attached directly to the main vine rather than by a stem.) While it is not uncommon for some of the male flowers to bloom first and fall off before female blossoms have started to open, if a lot of blooms are falling off without fruiting it’s probably because they aren’t being visited by pollinators. In order to flower, pollen needs to be transferred between male and female flowers by insects. Perhaps cool, wet or windy weather has kept pollinators away this year. If you spray to control insects or plant problems, be aware that herbicides and pesticides can also harm beneficial insects like bees. Whatever the reason, if you lack pollinators, you can hand pollinate plants yourself by using a Q-tip or small paintbrush and swirling it inside a flower and then moving from flower to flower as a bee would, swirling the Q-tip or brush gently each time.
Raise your hand if you don’t feed your plants like you know you probably should? Yeah, my hand is up, too. There’s no question that plants need nutrients to thrive but, somehow, fertilizing is always low on my list of gardening tasks.
Part of the reason for this is that the garden really doesn’t look like it’s struggling, so I put off feeding for another day. But left on their own year after year, plants will deplete the soil of primary macronutrients nitrogen (N), phosphorous (P) and potassium (K), which is why you find these most often in packaged fertilizers you buy off the shelf.
To a lesser degree, and at a much slower rate, secondary and micronutrients like sulfur, calcium, magnesium, iron, copper and manganese may also be depleted over time.Read More»