hope the photo has uploaded. The leaves look a little stressed but not to the point of concern. Delphinium is a genus of about 300 species of perennial flowering plants in the family Ranunculaceae, native throughout the Northern Hemisphere and also on the high mountains of tropical Africa. Black leaf spots are caused by small mites called cyclamen mites, which devour parts of the leaves and stems of the delphinium plant. Delphinium can be fussy to grow. I would continue the good care. - Greetings I purchased a awesome purple flowering Delphinium and some of the leaves are brown and coming off and all… Q. Once you’ve watered and mulched in autumn, delphinium care in winter is minimal. As the name more than suggests, this is a disease where plant stems rot at the base or the "crown" of … Eremurus and foxgloves are somehow gauzier and more delicate, making less of a solid block, but that big clumpy, forest-like density of delphinium colour is their great contribution. Distorted, curly leaves are caused by aphids or plant lice. At this time of year, delphiniums stand about in the garden like rockets or fireworks that have left their blazing trail standing in the air – the most vigorous and meaty verticals the summer garden can provide. That would stress the plant. this 2 year old delphinium was growing strongly then suddenly stopped growing. If you have leaves you’d like to use as mulch, chop the leaves up by running a mower over them a couple of times first. Save A Dying Aurora Lavender Delphinium - Hi - I bought a gorgeous Lavender Delphinium earlier in the summer. Application of insecticidal soap twice a week is quite effective in removal of these pests. The leaves started drooping and turning yellow and it is clearly dying. It was always brown or somtimes yellow and drooping. Avoid using whole leaves as mulch; they will form soggy mats that can smother your delphiniums. Nearby plants seem to be ok but I'm frightened its something that will spread . Does anyone know why or any advice what to do. is there a particular fertilizer someone thinks I should use? I … Was it in flower or full growth when you moved? I'm definitely hooked. 30 Jun, 2013 delphinium disease. Delphinium Winter Care. the first picture shows a delphinium I have where the leaves are doing good, but it is dropping just slightly. At the top of the list is delphinium crown rot. Q. Delphinium Lost All Its Flowers. If anyone has any recommendations after looking at the following few photos please let me know. You indicated that you moved the plant? I guess I need to learn some of the finer points of growing them though because the foliage of my delphinium often looked bad. I grew delphinium for the first time this year and I loved them! The genus was erected by Carl Linnaeus.. All members of the genus Delphinium are toxic to humans and livestock.