Can I grow plants in compost only? You cannot grow plants in compost only because the material is too light and will cause the water to drain too fast. The soft and crumbly texture will not provide good support to the plant's roots and cause it to topple over. The compost can lead to excess nutrients making it toxic for the plants.
Is compost the best fertilizer?
Home made compost contains nitrogen, phosphorus and potassium—the NPK fertilizer numbers—in levels around 3-0.5-1.5. Compared to commercial fertilizer that might have 20% nitrogen, compost does have lower levels of nutrients. But 3% nitrogen is a fairly good fertilizer when compared to other natural organic products.
Are fertilizer and compost the same?
Compost and fertilizer are not the same. But compost does have fertilizer value. Wikipedia describes fertilizer as “any material of natural or synthetic origin that is applied to soil or to plant tissues to supply one or more plant nutrients essential to the growth of plants.” Compost feeds the soil.
Can you compost potato plants?
Like their relative, tomato plants, the jury is out on whether or not to compost potato plants (aka potato haums or potato tops) – the leaves and other matter left over after you've collected the spuds. In brief, yes, they can technically be composted but in basic heaps, it's probably not worth the risk.