20160819-20160819-img_9127-2I've been in love with Piet Oudolf's gardens since I came across a copy of Designing with Plants by Oudolf and Noel Kingsbury while browsing in Barnes & Noble in 1999. I'd never before seen the kinds of startlingly romantic, lush, naturalistic, absolutely stunning plantings I found in that book. I was smitten, and I haven't gotten over it since. So when Carolyn Mullet, a well known garden designer from the DC area, gave me the opportunity to join her carexTours' Dutch Wave tour last August, I jumped at the chance.The carexTours itinerary was structured to give us a superb overview of Dutch Wave design, as well as glimpses into work of several other major garden designers in The Netherlands (and one in Germany), all packed into a week of two garden visits (sometimes three) each day. Come to think of it, we visited a couple of magnificent nurseries, a museum, a garden tool maker, and a palace too. Over the next few months, I'll be reporting on my own experience on this great tour.20160819-20160819-img_9099Unlike many staid and rather academic garden tours, Carolyn's was a hoot. She collected a really fun group of simpatico designers, garden makers and nursery owners from Canada, Sweden, Lithuania, Greece, the UK, Australia, Tasmania, and the US. The international appeal of the Dutch Wave style was certainly evident in the geographical diversity of our band of travelers. I can't remember ever having such a good time touring gardens.Since Piet Oudolf is the leading proponent of the Dutch Wave style (he more-or-less invented it), this post is about my first visit to Piet Oudolf's home garden, Hummelo--the 'omphalos' of Dutch Wave gardens. We also visited two other gardens designed by Oudolf--Vlinderhof, an extraordinary and relatively new public garden, and a small private garden none of us had heard of before, Tuin aan het Weeltje (this was the favorite of some)--but I'll describe our experience at those gardens later.Hummelo is particularly important because it is Oudolf's home garden and the place where he experiments and trials plants, and where his wife Anja operated a very famous nursery for many years.20160819-img_8998When the carexTours coach dropped us off at the end of Piet's driveway, and we walked to the house entrance, everyone was full of anticipation, perhaps even a little nervous. We were about to meet "the man".20160819-img_8935Piet is typically Dutch, not one to brag about being one of the most famous garden designers on the face of the earth, certainly not a glad hander in the American style, actually rather reticent to mix it up with a bunch of strangers, but we quickly discovered a man of generous spirit who became intensely engaged when asked a question about plants, and gave far more than we had reason to expect. I wasn't watching the clock, but it seemed he spent the whole of about two hours with us.20160819-img_8940After a brief introduction and Q&A to get a feeling for who we were as individuals, Piet took us to the garden in front of his house. One of the first things he showed us was this 25-year-old border, evidence that the Dutch Wave--or 'New Perennials' style as it's known by many--can result in highly stable plantings if the appropriate plants are used in the right place. Behind the border you can see parts of the great hedges that make a formal contrast with the wild exuberance of the plantings.20160819-20160819-img_8943We roamed freely, looking at plants and plant communities, frequently asking Piet the name of a plant, questions about why he designed a planting in a certain way, or about the history of the garden.20160819-img_8959xHe told us it had been a rather rough summer in the front garden. Too much rain, combined with a naturally high water table, had damaged some plantings and outright killed all his Baptisias. This was a familiar story to some of us who already knew his famous "wavy" hedges had been removed a few years before for the same reason--high groundwater.The front garden, and I'm judging only from images I've seen of the garden over the years, appears to be much more thickly planted now than in the past, with a lot of block planting and quite a bit of mixed planting too. Piet told us that he's letting the plants take the lead in the back garden, and intervening minimally, but it appears some of this freer approach may be the practice in the front garden too. He does experiment constantly.20160819-img_8964Piet also told us he has found that Sporobolus heterolepis (Prairie Dropseed) performs so well in his conditions that he's using much more of it now than in the past. In fact, he's using it in place of several other grasses. There are billowing clouds of it in the front garden where it works almost as a matrix plant. You see masses of it,  often mixed with flowering plants, such as the small, delicate flowers of a tiny lythrum (I think he said it was from Russia), as shown below ...20160819-img_8968... or in combinations with much bolder plants like bright red Helenium.20160819-img_9020Big "camel-back" hedges have always been a prominent part of the border of Piet's garden. Here they enclose exuberant plantings rollicking like a sea surface of varied colors, forms, textures and shapes, accented by occasional spire-like emergents.20160819-img_8993I particularly liked this simple planting of the dramatically flowing grass, Nasella tenuissima, and formal hedges right up against the front of the house--another example of contrast between billowy forms and straight edges.20160819-img_8939And another contrast below, with huge umbels of flowering Joe Pye Weed against delicate grass tracery.20160819-img_8969When you read about the importance of plant structure and seed heads in a Dutch Wave garden ...20160819-img_8962... this is what is meant. This Veronicastrum virginicum flowered long ago and its stately, complex, symmetrical spire-like seed heads will help carry garden interest well into winter.20160819-img_8988Above, an extraordinary effect of light combined with color and fragile grass form suggests a floral 'explosion' caught in the bright sunlight.20160819-img_9045This complex arrangement of forms above shows the beauty of unusual plant combinations allowed to create their own dramatic surprises--here red Helenium, blue Lobelia syphilitica, tall Verbesina alternifolia, and the twisted, gothic squiggles of brown Veronicastrum virginicum seedheads. This is a masterful composition.Below, in the space between the front garden and the facade of the house, you get a sense of the greater openness of the early Hummelo.20160819-img_8947After stepping a few yards back into the front garden, much of that space seems to disappear in the fullness of the garden proper.20160819-img_8981That large hedge you see is actually a tunnel. There's a great deal more going on here than I have space to explore in this blog post ...20160819-img_9084... because we still have to see the back garden, where the nursery used to be, and Piet's studio. Below, between the back of the house and the back garden, is a kind of perennial and grass anteroom, to give the visitor a kind of breathing space, analogous to a musical interlude, before plunging into the garden proper.20160819-20160819-img_9100Piet invited the group to view the garden from above, and took us all up to the roof of the studio. This is what we saw.20160819-20160819-20160819-img_9160-2Though I'd never been in the garden before, I quite clearly remember photos of the back garden soon after the nursery had been cleared away and initial plantings had been completed. The garden then was much leaner, with Calamagrostis acutiflora 'Karl Foerester' used like sentinels throughout. Those Calamagrostis plantings have grown much larger and fuller now. You can see how their golden late summer color almost dominates at this time of year.20160819-20160819-img_9174Above, the back garden looking from the other side of the studio roof. Large masses of Joe Pye Weed dominate near the studio but a huge variety of perennials and grasses compete in the space beyond.20160819-img_9109Piet explained to us that he was trying something new in the back garden. If I understood him correctly, he's intentionally letting the garden go, allowing the plants to intermingle and compete, just to see what will happen. He's always experimenting, and you can be sure he intervenes when he thinks it appropriate.20160819-img_9146Here Piet Oudolf is plunging through the garden, members of our troop straggling behind him (he's a tall man with a long, fast gait). Note the tall, thick plantings.20160819-20160819-img_9114This figure below is not a statue, it's a painted cut-out, a remembrance of the old nursery, Kwekerij Oudolf.20160819-20160819-img_9139And here is the studio, quite an attractive building ...20160819-20160819-img_9151... banked on this side by tall, flowering plants ...20160819-20160819-img_9147 20160819-20160819-img_9159... and on the entry side, by massed grasses, here Spodiopogon sibericus (a grass not used frequently enough) ...20160819-img_9158... with Calamagrostis and some Deschampsia in front.20160819-img_9157I love that he allows grasses to grow in the cracks between the pavers.Once we were inside his studio, Piet indicated he had something special to show us. He had just finished work on a new meadow garden to be planted at the future Delaware Botanic Garden, and we would be among the first to see the plans. He then laid them on the table before us.20160819-img_4999He also tried to give us some impression of his design process by showing us a selection of plant lists and notations ...20160819-img_5002... and hand drawings to illustrate the evolution of the design process.20160819-img_5008 20160819-img_5009 20160819-img_5003Then he set down at the computer to show us the completion of the process from hand drawn plans to finished designs.20160819-img_5021While we were on the roof of the studio, I had noticed other visitors had begun to trickle into the garden. We were no longer alone. So once Piet completed his computer presentation, we said our goodbyes and took our leave, walking the long distance from the studio at the back of the property to the front of the drive to board our coach.20160819-img_9204After we boarded, and as the coach pulled away from Piet Oudolf's Hummelo, our band of "Wavers" burst into spontaneous applause! Enough said.

(During the tour of Hummelo, I listened but didn't take notes. I believe I've reported our visit accurately. But because this was such an important part of the tour, I invite corrections in the Comments to this post.)