Roses can tolerate some partial shade but they need ideally at least 6 hours of direct sunlight to thrive if not more. Some species are more shade tolerant then others such as zephirine drouhin but the less sunlight the rose receives the less the rose will bloom and the more leggy the rose will become.\n\n\n\nHow Much Sunlight do\nRoses Need?\n\n\n\nNearly all varieties of roses prefer to be in a sunny position in your garden with at least 6 hours of sunlight per day. \n\n\n\nRoses that do not receive enough sunlight display significantly less flowers and become leggy, which is where the rose canes may flop over or grow tall with a spindly appearance as the plant looks for more light.\n\n\n\nIn my personal experience even roses that are labelled as \u2018shade tolerant\u2019 still do best in 6 hours of sunlight but the rose variety Zephirine Drouhin will produce flowers and survive in partial shade. \n\n\n\nGenerally Roses love the sun and depriving them of direct light will lead to an unhealthy rose which is more susceptible to disease and pest damage.\n\n\n\nIn order to establish exactly how much direct sunlight a spot in your garden receives I recommend this product on amazon, that not only measures sunlight but also the pH of the soil and the soils moisture content.\n\n\n\nWhich Rose Grows Best\nin Partial Shade?\n\n\n\nThe variety Zephirine Drouhin produces beautiful pink\nflowers with a strong fragrance. Fortunately Zephirine Drouhin is thornless\nclimber so you are far less lightly to be scratched during transporting, planting\nand pruning the plant.\n\n\n\nI have seen Zepirine Drouhin produce impressive blooms with\n4-6 of morning sun, whilst shaded in the afternoon.\n\n\n\nThis is the only variety I have personally seen that can live in partial shade yet still produce a pleasing amount of flowers, which if you dead head at the right time, (as soon as the flower begins to turn brown and looks spent) will carry on blooming throughout the season. \n\n\n\nAlternatively, to find more light, you can remove any tree branches that casts shade over your garden and cut back any surrounding vegetation around your rose bed so your rises receive more light and air. \n\n\n\nWhen planting roses you should be conscious that roses need\na lot of space to grow. Many rose bushes will require the same amount of width\nas they do height. So if your rose bush grows to 3ft (0.9 m) in height then it\nwill need 3ft in width.\n\n\n\nRoses also like their space away from other plants. A well spaced rose that allows the air to circulate will be less susceptible to the common diseases such as black spot and powdery mildew. Space your rose at least 2 feet from other substantial plants that may restrict air flow or cast shade on the rose.\n\n\n\nIt\u2019s also very important to leave enough space around the rose so that you prune it back in the winter without being scratched with their thorns. \n\n\n\nRose Growing Checklist \n\n\n\nTo grow roses in partial shade you need to optimise the\nother conditions for rose growth to give them the best possible chance. The conditions\nare:\n\n\n\nThe optimal soil pH for roses is slightly acidic to neutral at 6-7 pH .Well draining soil with plenty of organic matter.A good rose based fertilizer in the spring and summer.4 gallons of water, (for an established rose) once per week.\n\n\n\nRoses prefer a slightly acidic to neutral soil in order to grow healthy. A PH of 6.5 is perfect for all rose varieties. If you are unsure of the pH of your soil then you can buy an inexpensive soil testing kit from amazon to check you are in the optimal range. \n\n\n\nI would strongly recommend buying this inexpensive product before you plant any expensive roses that will die if the soil is either too acidic or alkaline.\n\n\n\nIf the soil is too acidic (a pH lower then 5) then you can amend the soil with wood ash which is alkaline and then retest the soil every month to see if you have made a consistent change to the pH or whether you need to add more wood ash accordingly. \n\n\n\nIf the soil is too alkaline then you need to add a deep layer of organic mulch to your rose bed to bring the pH back down into the appropriate range. Well rotted compost, composed of grass clipping, leaves and kitchen scraps will be in the correct pH range and help neutralize the soil\n\n\n\nRoses benefit from organic mulch such as compost for many\nreasons:\n\n\n\nA generous layer of compost around your roses will keep the roots cool in the scorching summer sun and insulated from the frost in the winter.The organic material feeds the worms in your soil, which produce fertile worm castings that stimulate plant growth. Not to mention the worm\u2019s activity will reduce soil compaction by aerating the earth. This in turn allows water to drain through the soil more easily which directly benefits your rose as the roots don\u2019t like to sit in stagnant water.Organic mulch heaped onto your rose beds keeps down the growth of both perennial and annual weeds and the softer ground is easier to hoe and dig out the weeds if they appear.Consistently adding organic mulch all year round will change the soil structure and make it easier for the roots of your rose to work their way into the soil and access the water and nutrients that they need.Organic mulch tends to absorb and hold onto water far better then the surrounding soil, so the roots can access that water when they need to. The mulch also has a light enough structure, so that excess water can drain through so that the roots aren\u2019t water logged.\n\n\n\nRoses are thirsty during the growing season so make sure\nthat they receive a good soak at least once a week in temperate climates. In\nhotter climates, or if there is a particularly arid summer you will need to\nwater with a good soak 2 or 3 times a week. \n\n\n\nThis is assuming that your rose bed has good drainage with a\ndecent layer of mulch. Water your roses at the base of the plant and water\nearly in the morning to prevent common diseases such as black spot and powdery\nmildew.\n\n\n\nFertilising roses is also a good way to ensure a healthy plant that is more disease and drought resistant. I personally use fish emulsion once a week usually from spring when I\u2019m confident we have had the last frost of the year to the end of summer. \n\n\n\nI stop feeding the roses in the middle of august because if you give them a feed too late in the year this can promote new soft growth that will be killed in the first frost of winter.\n\n\n\nConclusion\n\n\n\nAll roses prefer to be in a sunny spot with at least 6 hours of direct light per day. If they receive less light or they are situated in partial shade then the rose will become leggy, flop over and potentially die.\n\n\n\nConsider cutting over hanging tree limbs or lower hedges in order to brighten up your garden for rose growing.\n\n\n\nZephirine Drouhin is the only variety of rose I have seen that produces significant blooms in partial shade, so if your garden is in dappled light or on the shady side, go for this variety.