As the plant's roots establish themselves throughout the late summer and early fall, you may want to put some thought to how you plan to protect your irises once the weather grows cold, especially if you live in an area with exceptionally cold winters. Snowfall can naturally protect the soil from the cracking and heaving that can occur during very cold weather and dislodge the rhizomes.  If your area doesn't reliably get snowfall, you may want to spread a loose mulch (like evergreen bough) across the ground to protect the soil. Don't apply a thick layer of mulch — this can actually trap moisture in the soil and cause rot. Destroy any irises exposed to heavy frost — left to rot, these plants can become havens for borer eggs. As the weather begins to warm, you can allow any snow to melt naturally and/or remove any protective mulches you used in the winter. As new plants begin to sprout up, keep a keen eye out for any weeds near your irises and pull them out as early as possible. Use environmentally-friendly herbicides or weed killers to keep grasses and weed away from the bases of your irises. In addition, you'll want to be wary of any encroaching pests, especially slugs. There are many, many ways to bait slugs, from commercial products to improvised home solutions. One very easy way to do this is to make a beer trap — fill a wide-mouthed jar halfway up with beer and bury it up to the rim of the jar in the soil. Slugs, attracted to the beer, will fall in and drown. Irises can benefit from the occasional light application of fertilizer starting the growing season after you plant it. Don't use a fertilizer high in nitrogen — this can cause excessive foliage growth (and, eventually, rot). Water after dispensing the fertilizer to avoid fertilizer "burn". Below is a selection of fertilizers that are acceptable to use with irises:  General purpose "5-10-10" fertilizer General purpose "5-10-5" fertilizer Bone meal Superphosphate As the iris grows more mature, the amount of time you'll need to spend maintaining it should decrease drastically. Still, even when your plant has been established for years, it's a good idea to give it a check up every few weeks just to ensure that there are no problems with it. As long as the plant is receiving good sun during the growing season, occasional rainwater, and nutrients from the soil, it should be just fine. Irises are perennials, and they'll gradually spread from the roots over many growing seasons. Every three to five years, you’ll want to divide the irises in crowded flower beds and replant them to avoid competition for water and soil.
احم النباتات استعدادًا للشتاء. أزل الأعشاب الضارة واحمها من الآفات في الربيع. راقب النمو ووفر لها العناصر الغذائية في الربيع. كرر الدورة حسب الحاجة.