Ganna Walska Lotusland: දේශගුණික තිරසාරත්වය සඳහා විකාශනය වන ප්‍රවේශයක්

මත පළ කරන ලදී Landscapes and Horticulture, Research හි පළ කර ඇත - අදහස් නොමැත ↓
Ganna Walska Lotusland: An Evolving Approach to Climate Sustainability

An Ecological Transition

The sustainable horticulture program at Ganna Walska Lotusland began 25 years ago when innovative staff applied evolving ecological practices. This endeavor began as a necessity when traditional fertilizers were failing to enhance Lotusland’s living collections and many plants were showing signs of distress.

In the early 1990s Lotusland utilized a wide range of synthetic fertilizers and pesticides to maintain the garden. Many of these chemicals were detrimental to the overall environment and the health of the plants they were supposed to benefit. Despite the potentially dangerous inputs, the garden still struggled with high instances of pests, diseases, and poor growth.

Drawing on the knowledge of experts in soil ecology, entomology, plant pathology and other fields, Lotusland gardens and grounds staff worked to transform the structure and guiding principles at Lotusland. They worked to move from a conventional model, reliant on synthetic products, to a regenerative approach – slowly phasing in organic fertilizers, creating insectary habitats, and curtailing pesticide use.

With this change of approach, the plants were revitalized and rejuvenated.  Twenty-five years later, Ganna Walska Lotusland is still building upon the foundation of its sustainable model by seeking new strategies that will improve the ecology of the garden and reduce environmental impacts.

Thanks to a grant made possible by the generosity of Eric and Wendy Schmidt, Lotusland has been documenting these sustainable horticulture strategies and developing new approaches, with the goal of making this wealth of experience accessible to all. “Sustainability has become a core part of our mission at Lotusland. As one of the country’s first public gardens to implement plant healthcare without pesticides, we are proud to share our methods and time-tested approaches,” shared Executive Director Rebecca Anderson.  “This grant has enabled a smooth staff succession, information capture and documentation of critical institutional knowledge and practices, and ultimately will benefit gardens and gardeners well beyond our borders.”

Soil testing at Lotusland with the Get Hooked Seafood Team. (Photo by DavidHills.net.)

Cross-Sector Collaboration – Keeping It Local

In 2022, Lotusland began a collaboration with Get Hooked Seafood – a for-profit local seafood purveyor centered on developing community partnerships.

Rather than turning their fish scraps and waste into chum or sending it to the landfill, Get Hooked has begun making incredibly high-quality micronutrient-rich hydrolysate fish fertilizer which recharges soil health and supports thriving plants. Co-founder and CEO of Get Hooked Kim Selkoe, Ph.D., reports that “harnessing the power of the sea to nourish our soils is a way to restore a natural land-sea nutrient cycle that was disrupted by coastal development.”

“If you go to Home Depot, you can find fish emulsion garden fertilizer – where fish is basically cooked down to create a fish slurry,” explains Lotusland’s Manager of Sustainability Chris Ziliotto. “Fish hydrolysate is exciting because it’s fermented instead of cooked; you have a lot more intact fatty acids, and a richer product with probiotics.” Get Hooked learned the process of creating fish hydrolysate by working with White Buffalo Land Trust, a hub for regenerative land stewardship and ecological research and education based in Central California.

Most fertilizer products used in botanic gardens are shipped vast distances and it can be difficult to find local fertilizer producers that are making high quality organic products. The fertilizer that Lotusland is replacing with the Get Hooked hydrolysate is a liquid imported from Spain. This represents dozens of gallons transported across thousands of miles annually – which comes with a huge carbon footprint and does not support the local economy. “Lotusland’s partnership with Get Hooked represents ‘the farm-to-table equivalent of fertilizer’,” says Ziliotto.

Lotusland’s Sustainability Manager with the Get Hooked Seafood Team. (Photo by DavidHills.net.)

The Trials

Lotusland is in the trial phases of applying this local hydrolysate fertilizer into the garden. The first trial was completed in Lotusland’s orchard with the Get Hooked hydrolysate being applied to test plots of annual flowers. This initial trial was to make sure there were no issues with phytotoxicity (i.e. no adverse effects on plant growth). There was some concern that heavy metals found in fish would make their way into the soils; however, the test results showed very safe levels of heavy metals with fractions of the legally allowed limit.

The plants in the initial trial grew wonderfully with the new fertilizer. Lotusland is conducting a second trial on a newly installed section of native insectary. “It’s unconventional to use fertilizer on native plants,” says Ziliotto, “this is a great opportunity to really make sure that the hydrolysate can be given to sensitive plants that don’t want an aggressive feed.”

Starting in March 2024, Lotusland will be conducting a year-long, side-by-side experiment comparing the Get Hooked hydrolysate with the soon-to-be phased out Spanish fertilizer. In-garden hydrolysate trials and soil tests will be conducted before initial fertilizer application and after the year is complete to see if there are significant improvements or impacts as a result of this switch.

Compost Tea Application at Lotusland. (Photo by DavidHills.net.)

The Four Pillars of Sustainable Horticulture

The larger mission is to show that this transformation is more significant than just switching to locally sourced fertilizer – that Lotusland is improving upon the practices they’ve been building for the last 25 years. Lotusland aims to showcase this, with plans to build interpretation into the garden in addition to their wider networks of outreach and communication.

“We’re developing onsite programming and content to add to our website alongside a new digital guide with Bloomberg Connects that provide visitors in the garden, and across the globe, insight into how we sustainably manage Lotusland and how these same tools and methods can be applied anywhere,” explains Director of Marketing & Communications Katherine Colin.

To this end, Lotusland has published Partnering with Nature, a technical guide aiming to share the Garden’s sustainable horticulture principles and practices with staff. This is also meant act as a guidepost for other institutions to understand and connect with larger ecological processes and holistic perspectives. The Guide encompasses Lotusland’s approach to sustainable horticulture which is built on four pillars:

  1. Understand Horticultural Requirements – by emphasizing plant research and providing proper growing conditions, plant health will thrive without reliance on synthetic inputs.
  2. Foster Habitat – by developing insectary habitat, the Garden fosters a diverse population of insects which act as pollinators, predators to pest insects, and prey to birds and other wildlife. This improved ecology helps balance pest populations, reducing reliance on synthetic products, and improving plant health.
  3. Build Healthy Soils – healthy soil is a dynamic ecosystem of diverse organisms which provide innumerable ecological benefits. Applications of organic fertilizer, mulches, compost, and compost tea bolster this soil food web.
  4. Avoid Harmful Practices – certain practices are not compatible with a sustainable approach to horticulture: in particular, the use of synthetic fertilizers and pesticides, and practices that contribute to soil compaction.  These detrimental practices add up and negate other pillars. Avoiding them sounds easy enough, but it’s not always simple.
During Lotusland’s Junior Botanists 4th grade outreach program, children learn not only about plants, but also the importance of biodiversity and sustainable horticulture. (Photo courtesy of Lotusland.)

Takeaways for Other Institutions

What makes Lotusland stand out is the incredible diversity supported in the garden. Even with plants from all across the globe, Lotusland is able to make them all grow beautifully, using the holistic sustainable approach that doesn’t require synthetic inputs.

“We recognize that we’re very lucky here in Santa Barbara,” admits Colin. “We have a unique climate that allows everything to grow seemingly magically – and we’re 37 acres. Those two factors, the size of the garden and the unique climate conditions, help us to follow this process.”

Ziliotto details the following suggestions for larger gardens and museum landscapes that wish to transition to holistic management:

  • Get creative with your spaces. Put “wasted space” to use by building an insectary comprised of native plants, even if they are not the focus of your collection.
  • Increase species diversity to promote ecological interactions that will keep pest populations in check.
  • හානිකර පළිබෝධනාශක නිෂ්පාදන සහ කෘතිම පොහොර පුළුල් ලෙස යෙදීමෙන් වළකින්න
  • සමහර පළිබෝධ සහ හානි ඉවසා සිටීමට ඉගෙන ගන්න

වෙනත් වචන වලින් කිවහොත්: ස්වදේශික වාසස්ථාන රෝපණය කරන්න, ඒවා ඉසීමෙන් වළකින්න සහ ඔබේ උද්‍යානයේ පළිබෝධ ගැටළු ඔබ වෙනුවෙන් කරන ප්‍රයෝජනවත් ජීව විද්‍යාව දිරිමත් කිරීමට ඒවා ඔබේ අවකාශය පුරා ව්‍යාප්ත කරන්න.

Ziliotto පවසන පරිදි, "උද්‍යාන සහජයෙන්ම බිඳෙනසුලු නොවේ", "අපගේ එකතු කිරීම්, දුර්ලභ විය හැකි තරම්, විශාල කාලයක් තිස්සේ පැවති ජීවී විශේෂ වේ. ඒවා වර්ධනය කිරීම සඳහා කාර්මික රසායනික ද්‍රව්‍ය සහ විෂ ද්‍රව්‍ය ඒවාට දැමිය යුතුය යන අදහස විකාරයකි.

ලෝටස්ලන්ඩ් බෙදාගැනීම ගැන ආඩම්බරයි Partnering with Nature පහත සබැඳිය හරහා Climate Toolkit සාමාජිකයින් සමඟ: https://www.lotusland.org/technical-guide/. උද්‍යානය හා සම්බන්ධ වීමෙන් අධ්‍යාපනික චාරිකා සහ තිරයෙන් පිටුපස චාරිකා ද සැලසුම් කළ හැක.

ලෝටස්ලන්ඩ් ජල උද්‍යානය. (ඡායාරූපය කිම් බේල් විසිනි.)

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