Here are the summer update photographs for the plants in the Spring in the Perennial Vegetable Garden 2015 post. (Photos here from 2013/4 and 2014/5).
The 'giant chives' I wrote about in April hasn't been gigantic yet. But I won't finally judge it until I have improved the organic content of my Allium beds and given it longer to get established.
No summer photograph for asparagus appears below. I made up an asparagus bed years ago but, stupidly mis-reading the directions, planted far too deep and only the odd thin shoot ever appeared. I tried replanting the old plants last year and was delighted when my first shoots of asparagus appeared in spring. But they proved, alas, to be the first and last shoots. So I've now dug out all the plants and will buy new ones in the autumn. (The quamash and golden garlic don't appear either as their foliage had died down and I could find nothing to photograph).
Oyster plant - Mertensia maritima
Pignut - Bunium bulbocastanum
Giant chives - Allium ledebourianum
Pearl onion - Allium ampeloprasum ssp. ampeloprasum
Variegated Daubenton - Brassica oleracea var.'Daubenton Panache'
Ewiger kohl - Brassica oleracea (translation 'ever-lasting cabbage')
Horseradish - Armoracia rusticana
Wild hyacinth - Camassia leichtlinii
Three-cornered leek - Allium triquetrum
Grass nut - Triteleia laxa
Bladder campion - Silene vulgaris - known as 'carletti' in Italy
N.B. I sell a range of perennial vegetable plants on my website.