Welshonion

Non-cultivar flowering plants

I suspect your friend's friend is in a bit of a muddle.  Do you mean named varieties when you say 'cultivar'?  

Double flowers are not good for bees and butterflies.  Nor are many foreign plants, but buddlias, heather and privet, brooms, ivy, clovers, obviously.  Honeysuckle for moths.  Do a bit of research on the internet and you'll find lots, I'm sure. Visit some gardens and see what's buzzing.

Remember bees and butterflies are more active in the sunshine.

Covering these rocks

Read the comments about Parker's plants before you buy anything from them.

If you were an amphibian, would you want to live here?

Yes, you will attract wildlife.  Frogs and toads travel long distances.  Dragonflies and newts too.  Just leave the pond be and things will come. The birds will bring things in on their feet, too.

But if you leave that watercress in there you'll never see them through the foliage, and one of the joys of a pond is watching what's going on in the water.

Raised beds depth

With something so shallow and relatively small it will dry out very quickly.  This can be a problem.

Never believe everything you see in a magazine.  The raised bed you mention will be fine for salad crops.

Help, are these plants ok for my small wildlife pond?

If I were you I would take the watercress out as soon as you can before it takes root and overwhelmes the pond completely.

If you leave it and then decide to remove it you will have great difficulty in getting rid of it all as every bit of stem left behind will grow into a new plant.

Onions getting seed heads on

Yes, remove the flower heads and make sure you use those onions first when you harvest them, as they will not keep.

Advice on cress

Yes,

Dead Leylandi

If it has been cut into brown stems, no it will not recover.  Give it the Heave Ho if you can.

Leggy mint - help!

Turn the plant upside down in your hand and remove the pot and I think you will find it needs a bigger pot as well as feeding and better light.

robinson greenhouse for sale

Advertise in the local paper.  Don't expect to get as much as you think they're worth.

Get the new owners to dismantle or you will have to pay for the inevitable broken glass.

Finding it hard to conceive of getting rid of two in situ greenhouses.  I think you will be flattened in the rush.

Swifts