You can have the most artistic ambition and grandest plan for your garden, but the reality is a ‘green thumb’ really doesn’t happen by accident.  While William Kent once said, “All gardening is landscape painting,” a beautiful, bountiful garden filled with annuals, perennials, and vegetables is actually a work of art and science.

The Science Cafe Nashua recently hosted it’s July gathering at the Riverwalk Cafe in Downtown Nashua (New Hampshire) to discuss  why it’s important for gardeners to understand how science impacts their gardening aspirations.  The discussion on “The Art and Science of Gardening” while free to attend, was a ‘sell-out’ with all 80+ seats at the cafe filled with gardeners ranging from novice beginners who participate in local community gardens driven by GrowNashua to expert master gardeners with beautifully designed landscapes that are worthy of Fine Gardening magazine.

While the midsummer topic was compelling, it was the strong lineup of panelists who brought people to the cafe during the midst of a week-long July heatwave. For two-full hours we participated in a Q&A session with gardening experts including:

Gene Harrington, owner of the Nashua Farmers Exchange;

Cameron Bonsey, executive with the Coast of Maine Organics (he traveled from Portland, Maine to join us!);

Isabelle Burke, an expert gardener with the Merrimack Garden Club and beekeeper who represented the Merrimack Valley Beekeepers Association;

Dave McConville, a permaculture designer and educator with GrowNashua;  and

Paul Shea, the executive director of our Great American Downtown who also happens to be a “Master Gardener” certified by the UNH Cooperative Extension.

The lively discussion covered  a full range of gardening topics, including how to control blight (specifically in tomatoes and peppers) to why we see so many rabbits in the Nashua area, and what’s the best way to ‘feed’ soil.

Here are a few of my big ‘ah-has’ from the panelists who did an excellent job at explaining how science impacts gardening. (If you’re reading this blog after attending this Science Cafe Nashua session, feel free to share what you learned with a comment.)

Smokers – You can attract blight! Nightshade plants like tomatoes, peppers, and eggplant are in the same plant family that include tobacco. Paul Shea explained that nightshades are very susceptible to blight – it’s a big issue and can wipe out entire tobacco farms.

With the smaller scale of a backyard vegetable garden, blight is typically spread when leaves touch contaminated soil. Helpful hints to avoid blight included keeping plant leaves trimmed well above the soil line and watering at the bottom of the plant to drive moisture directly into the soil versus via leaves.

Here’s what really surprised me. Gardeners who smoke can be more prone to finding blight on their plants – the two reasons are that some gardeners leave cigarette butts (remember tobacco attracts blight) in their gardens and the nicotine from tobacco sticks to fingers and spreads to plants when touching, pruning, and picking. This nicotine residue of tobacco attracts blight.  So, gardeners who smoke now have another reason to stop their habit if they want a bountiful harvest.

Bees don’t like the red flowers.  A question was asked why bees haven’t returned to one participant’s garden this year.  After some discussion with Isabelle Burke, we learned that the person seeing fewer bees this year changed their garden color scheme and has almost all red flowering plants and very few purple and yellow flowers, which are  favorites of bees.  This surprised me for a few reasons – since pollinators include hummingbirds, and they like red, I just assumed that all pollinators, including bees,  were attracted to that color.  I also didn’t realize bees are drawn to color. I thought they were only attracted to the scent of flowers.

Nashua is being overrun by rabbits. Gene Harrington told us that rabbit populations have an 11 year cycle and our region appears to be in year seven or eight of that cycle. So we should be seeing fewer bunnies in coming years. He shared that he’s heard over the past few years from more customers who are seeing  rabbits and, of course, they reach out to Gene to find solutions to their rabbit problems. Apparently, the best way to control rabbit damage is to put up fencing/barriers around the plants that they find delicious to eat. Another option is to plant things rabbits don’t find so delicious. In my case, the rabbits in my neighborhood love the clover that I’ve been planting as an alternative to grass, so I will just keep buying clover seed to replace it. (But I will confess, I actually enjoy seeing bunnies hop through the garden and just hope that the experience of another Science Cafe participant doesn’t happen while I’m watching – his garden bunny became lunch for a red-tailed hawk – which are also prevalent in our region. I guess everyone needs to eat.)

Soil lives and breathes – we need to treat it well. Cameron Bonsey talked a lot about soil. He likened the work of creating soil blends at Coast of Maine to the craft brewery movement in New Hampshire. He explained that their employees experiment with different mixes for different purposes. I specifically asked him about their Stonington Blend that I blogged about late last year. He explained that soil is all about biology and something things plants respond differently to different mixes of nitrogen, castings, etc. He also talked about the importance of mulch and how it feeds soil. Cameron quipped that “all the organic matter under the mulch is eating and greeting – there’s a great party going on under there.” This is why it’s better to mulch with a compost-based product and not cheap wood chips that take forever to break down and don’t provide nutrients back into soil. (Hearing this made me feel good as we stopped spreading bark chips in our garden because of this and started to mulch with compost instead.)

GMOs are not a natural evolution.  There was a question about the scientific aspect versus personal feelings on the surge of GMOs (genetically modified organisms). This seemed to be a sensitive topic to both the person asking the question, as well to the panelists asked for their input. Dave McConville, the panel’s permaculture expert shared that GMOs are not a natural evolution, while not speaking for or against them. I urge you to learn more about permaculture at Dave’s website – here’s a teaser, “Although permaculture is first and foremost a design process, it is also a philosophy, a life style and a framework for making decisions. Permaculture gives us a toolkit with a set of ethics and principles, design processes and proven strategies to help us design a better culture.”

Ultimately, I learned that true gardeners – no matter how long we’ve been digging this hobby –  are always eager to learn from one another and to share our own experiences, including the successes and failures.  What worked this year, might not work next year – and there’s often a cause that someone learned before us. For example the gardener who wants to see more bees left the Science Cafe with the the information not to plant all red flowers next year and perhaps add a little more lavender – a favorite of bees.

Speaking of lavender, here are a few more photos from the July 2018 Science Cafe Nashua at the Riverwalk Cafe. Let’s start with the top two photos that include the fabulous “Gardener’s Gimlet” made with local lavender syrup that was offered as Riverwalk’s special craft cocktail of the evening in honor of the Science Cafe event (the woman in the top right photo with the gimlet is Jane Ruddock, co-owner of Riverwalk and quite the expert gardener herself). The other photos are of the full house of gardeners asking questions and sharing ideas and experiences.

 

 

“There are no gardening mistakes, only experiments.” 

~Janet Kilburn Phillips