Roots giving off a foul and musty odor is also a sign of root rot. A good rule of thumb to follow is to use a pot two inches larger than the root ball of the plant being potted for smaller growing plants and about three inches larger for the larger growing plants in the table. Sarah Terry brings over 10 years of experience writing novels, business-to-business newsletters and a plethora of how-to articles. The leaves emerge frosty blue with a bright yellow margin that lightens to creamy white during the summer. The fungus would need to travel over the cement blocks, across cedar chips (6-8') to reach other hosta beds if traveling across the ground. Remove excess mulch in the spring as weather warms making sure it is away from the crown of the plants to avoid crown rot. Hostas planted from bare root starts or small containers may need to be potted in a smaller container for the first year. Check out our hosta root selection for the very best in unique or custom, handmade pieces from our craft supplies & tools shops. A fungicide may help prevent the disease. Hosta (Hosta) Plant Health Problems See Perennials for a detailed discussion of problems that may occur and are common to most herbaceous ornamentals. It is a showier version of 'First Frost', displaying extra wide margins. Shipping container grown plants instead of bare root plants means that you receive a hosta plant that's ready to take off in your garden from the day it arrives. Composting manure above 131-degrees Fahrenheit for at least a couple weeks kills harmful pathogens, dilutes ammonia, stabilizes nitrogen, kills weed seeds and reduces any objectionable odors. Hostas are low-growing, clump-forming perennial plants grown mostly for their lovely foliage, but beyond this, a single description is almost impossible, since there are hundreds of varieties available, ranging from those with tiny leaves about 1 inch in diameter growing in a 6-inch clump to giant specimens with leaves that are 18 inches long growing in clumps 6 feet across. While symptoms may vary from plant to plant, there is often little you can do once … Sunken lesions may occur at the soil line. The smaller ones you can do one or two gallon pots. When mulching your hostas, don't allow the mulch to cover the crown or touch the leaf stems as this can cause rot. The best soil for hostas is well-drained with plenty of moisture-absorbing organic matter … I potted them up and they have all come ahead with roots and new leaves. However, Phytophthora nicotianae causes both foliage blight and root and crown rots on hostas grown in nurseries in the southeastern U.S.; similar diseases may occur in landscapes. Eden Brothers offers the highest quality hostas for the lowest prices anywhere. Diseases caused by Fungi: Basal or root rot, Rhizoctonia solani or Pythium spp. Symptoms Foliage blight. Propagating hostas by dividing rhizomes is the most popular method due to its simplicity. By planting in pots you allow more cold air to the roots in winter because they need a cold spell, they are dormant. root and crown rots as well as foliage and flower blights on many ornamental plant species worldwide. Get it as soon as Mon, Jul 20. Covering the crown results in rot, and your hostas will die. Until recently, they were not known to attack hosta. I am now aware of sanitizing and quarantine needs. Fusarium root/crown rot – This fungal disease usually appears in late spring, when leaves turn yellow and brown before they die and drop from the plant. As each bare root hosta is removed from the box, Carlos checks each one and untangles any roots. It affects herbaceous plants and some woody plants but is most commonly found on ajuga, anemone, campanula, chrysanthemum, delphinium, hosta, hydrangea, iris, narcissus, phlox, rudbeckia, scabiosa, sedum, and tulip. A Master Gardener demonstrates how to detect two common root pathogens in woody plants.