How to Plant Ajugas. Will ajuga work in this manner, is it able to out-compete other aggressive plants? After looking at the cause, (stems & roots wilting & dying) I read that fungus will cause this. They tend to feed on the underside of leaves and you'll often see the white shed skins. I welcome comments about my web pages; feel free to use the form below to Chocolate Chip Ajuga leaves are curling, can anyone tell me why? For the benefit of other visitors Whorls of tiny, blue-violet flowers appear in mid to late spring on spikes rising above the foliage to 10". The Ajuga plant is very easy to look after. It's just gone. I hope that you enjoyed this guide on Ajuga. Any ideas about what to do to stem the die off would be greatly appreciated. Right before the leaves fall off the plant, they will turn yellow. 1 Answer Garden & Landscape9 years ago. It is an evergreen plant prized for its dynamic color that … They can usually sustain themselves with rainfall. It quickly spreads by runners, forming a dense carpet of colorful foliage, accompanied by abundant outstanding blue or pink spring flower spikes. Carpet Bugleweed (Ajuga reptans): This is a very popular ground cover. We live in deer infested area. It's a pretty groundcover, but it often succumbs to disease. Roots blacken and become covered with white fungal threads. Is there a difference between giant ajuga and other types of ajgua? For best results they should be fertilised in the spring and watered frequently. ,