What makes our rhubarb great? Well, last fall we put a layer of our chicken manure compost over our garden. This compost is a great source of fertilizer for the rhubarb and My son has just consumed some of this which I believe to be Zz plant and looks be poisonous. Can anyone advise please? This is how to collect my dahlia seeds., Now, dahlias are far easier to grow from a tuber, so not many people trying growing them from seed, but every single dahlia I have in my garden (except for my Collecting Common Columbine Seeds for Your Garden