Tag Archives: bog garden

Wild Garden: June and July

I haven’t forgotten my wildlife gardening challenge – it’s just been a busy few months with lots of work travel. So here’s a quick update on what I have done lately to make my garden even more wildlife friendly.

June – wildflower disaster

I’ve been trying to increase the number of types of native wildflowers in my garden, particularly for the shade planter and pallet planter. I sowed foxgloves, common dog violets, white clover, and wood forget-me-not in my propagator earlier in the spring. They eventually germinated, and, in June, once big enough, I moved them to the greenhouse to harden off.

Wood forget-me-not seedlings
Wood forget-me-not seedlings

Sadly the slugs came and ate them

all (apart from two little clover seedlings), so it was back to square one. I’m now just waiting for the new seedlings to get big enough to transplant.

 

I need to find a solution to the slug problem – they ate all my basil and chilli plants as well. I was hoping that eventually we’d get enough slug predators in the garden to keep the population under control. But that hasn’t happened. The hedgehogs ignore slugs, and if the slow worm is still around it’s not making a dent in slug numbers. Obviously slug pellets aren’t an option for my wildlife garden. I don’t want to use nematodes, as I don’t want to get rid of all the slugs, just stop them eating my precious plants. I don’t want to trap them, as I don’t know what to do with them once caught. I think some kind of barrier is the approach for me – I’ve bought some wool pellets (that deter rather than kill slugs) in the hope they will keep the slugs off my precious plants.

July – insect-friendly plants

July’s gardening has been about planting flowers for insects. We’ve dramtically increased the number of flowering plants in the garden, including:

  • even more lavender

    Salvia Amistad
    Salvia Amistad
  • several types of salvia, including Patio Deep Blue and Amistad
  • vivid violet scabious

    Vivid violet scabious
    Vivid violet scabious
  • red, velvety Cosmos
    Cosmos atrosanguineous
    Cosmos atrosanguineous

    atrosanguineus

  • Lady Boothby fuscia
  • Antirrhinum
  • First Lady Veronica

    Veronica First Lady
    Veronica First Lady

At the garden centre we hunted out plants with the ‘Perfect for Pollinators‘ logo on the label. This was quite straightforward for perennials and shrubs for the border – plenty to choose from. We made a shortlist, and tried to pick a mix of species with different colours, flower shapes and flowering times, to suit as wide a variety of insects as possible. It was harder with bedding plants for our pallet planter – most of the petunias, marigolds etc. on offer have been bred for their looks, rather than accessibility and attractiveness to insects. In the end we managed to find some antirrhinum with the ‘Perfect for Pollinators’ logo, and then squeezed some lavender and lobellia (for its looks) in as well. If you can’t find plants with the ‘Perfect for Pollinators’ logo, watch which ones the insects at the garden centre head towards.

The bees at home couldn’t wait for us to get the new plants in the ground! I knew I had made a good choice when a bee landed on one of the salvias when it was still in its plastic bag in the garden.

Seeing the effect of previous Wild Garden tasks

We’re already seeing the benefit of some of our earlier Wild Garden activities – the solitary bee house seems to have lots of residents, which is very satisfying. If you build it (or install it), they will come.

Bee house with sealed-up cells
Bee house with sealed-up cells

And the bog garden plants are growing nicely, with the loosestrife looking good and attracting insects at the moment.

Bee on loosestrife in the bog garden
Bee on loosestrife in the bog garden

Frogbert and Frogmilla are regularly spotted keeping cool in the pond (when the coast is clear of next door’s kittens). And the buddleia has exploded with flowers, attracting butterflies. The garden is full of life right now.

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How to create a bog garden

Boggy areas are excellent for encouraging more wildlife into your garden. They’re particularly good for amphibians and insects. But if your garden isn’t on the edge of a stream, how can you create such an area? The answer involves rather a lot of digging.  Dr C and I like a bank holiday project, so that’s what we set out to do at the beginning of May.

You will need:

  • Somewhere to create it
  • A spade
  • A tarpaulin to put the soil on
  • Pond liner or other sturdy waterproof membrane big enough to line the pond (this is a useful calculator to help you work out how much you will need)
  • Water (preferably rain water from a water butt)
  • Perennial plants suitable for boggy or moist areas (see below for how to pick them)
  • Some logs or stones to edge the bed, hiding the pond liner

1. Pick your site

In the wild, these sorts of habitats often occur next to streams or ponds, so we chose to create ours next to our barrel pond. If your pond is level with where you want to create your bog garden, you can create a beautiful uninterrupted effect. That wasn’t an option for us, but being next to the pond will make life easier for the frogs and insects.

A pond isn’t a prerequisite for a bog garden (and if you can’t have a pond, a bog garden is a good alternative). But ponds are brilliant for all sorts of wildlife, even if they are tiny, like ours, so do consider creating one – it’s another very satisfying weekend project.

2. Mark out your bog area

You can use pegs and string to mark it out, or, like us, mark the edges with spade cuts. We went for a curved shape to match the shape of the pond.

3. Start digging

Once you’re happy with the shape and size of the bed, start digging. This is the time consuming bit. You’re aiming for a straight sided hole 50-60cm deep. Dr C did most of the hard work (as usual), but I did enough digging to ache all over for the next few days.

First we took off the turf, using it to thatch the hedgehog house. Then the serious digging starts. How hard this stage is depends on the type of ground you’re digging. In our case, it was pretty tough, as the ground under our lawn seems to be 60% building rubble. We dug up bricks, paving slabs, carpet and even a buried pipe (not connected to anything, thankfully), as well as a load of stones, and plenty of earthworms. It felt like we were on a Time Team excavation, digging up the inevitable small wall.

The bog garden hole
The bog garden hole
The soil and rubble from the hole (note the pipes and paving slabs)
The soil and rubble from the hole (note the pipes and paving slabs)

4. Line your hole

After trying to get rid of any sharp stones on the edge and bottom of the hole, we put a layer of sand on the bottom, to try to prevent anything piercing the lining. We then put the pond liner in place, pushing it into the corners of the hole, then trimming generously. We then stabbed a couple of small holes in the bottom, to allow water to drain away slowly. From what I have read, the general recommendation is a garden fork’s worth of holes per square metre. Our hole was about half that, so we went with 2 holes. The more holes you make, the faster it will drain and the less boggy, but you will need some drainage.

We added a layer of sand to the bottom of the hole to protect the pond liner
We added a layer of sand to the bottom of the hole to protect the pond liner

5. Fill in the hole

Time to undo all that hard work. First add a layer of smoothish stones, to prevent the holes becoming blocked by soil.  Then chuck all the soil back in your hole. We also added some compost, but you could also add some manure.

Filling the lined hole back in
Filling the lined hole back in

6. Water

We watered the new bog garden bed with a couple of cans of water, then let the soil level settle overnight, before topping up with soil then watering and letting it settle for a few more hours.

Leave the filled hole to settle
Leave the filled hole to settle

7. Trim and edge

Trim the pond liner more neatly, and tuck it away. We used a mix of logs and stones to edge the bog garden. These make it neater, hiding the pond liner, and provide some good hiding places for small creatures.

8. Choose your plants

I chose a mix of native plants that like boggy or moist ground. My selection includes a variety of flower shapes, colours and flowering times, to try to provide food for as many difference insects as possible. I also chose a mix of heights.  The plants I went for are:

  • Devils bit scabious
  • Water avens
  • Loosestrife
  • Marsh marigold (otherwise known as kingcup)
  • Meadowsweet
  • Marsh cinquefoil
  • An iris (a relative of the native yellow flag iris, but smaller and blue)
The edged and planted bog garden
The edged and planted bog garden

If you’re in the UK, here are a couple of nurseries that specialise in pond plants and have a good selection of native species (and do mail order):

How it’s going so far

The plants seem to be settling in well – we’ve had flowers from the meadowsweet and marsh marigold already. An insects seem to enjoy it. Next door’s kittens also seem to enjoy walking along the logs at the edge, so I hope amphibians will avoid it until the plants provide more secure cover…