Tips for preventing rose diseases.
Plant roses that are know to be hardy and disease resistant. Plant the roses with proper spacing so that there is good air movement around the rosebushes, do a thinning pruning on roses that become very dense with foliage. Not alot is needed, just enough to allow air movement through the rosebushes. The proper air movement through and around a rosebush helps keep some diseases away as they have no calm, dark and moist areas to get going. I spray my rosebushes at 10 to 14 day intervals with an earth friendly fungicide called Green Cure at the cure rate and have not had any problems with powdery mildew or black spot for several years now. Spend time in your rose beds really looking them over, check the top and underside of leaves for insect damage or insect eggs. Catching a problem early on goes a long way to gaining control over it. Here is a link to an article on spacing of rosebushes for you: https://www.gardeningknowhow.com/ornamental/flowers/roses/spacing-roses.htm
We have recently moved to a new house and the 'new' garden has Iceberg roses growing in the shade, which I would like to move into the sun. There is no bed available for them so I would like to put them into pots. Will they grow in pots?
The Iceberg rosebushes will do better planted in the ground typically. However they will do okay planted in big pots that are at least 20 inches in diameter and at least 20 to 24 inches deep. Make sure the big pots have drainage holes in the bottom. Place a layer of 3/4" gravel at the bottom of the pot to create a good "drainage zone". Bagged potting or garden soils are best to plant them in. Once dug up and planted into the pots, water them in well with water that has both a good root stimulator and a product called Super Thrive mixed into the same water. This mix will help get the root system going and also help with transplant shock.
My rose bush's leaves turned yellow and are falling off. What did I do wrong?
I think you also posted a photo of your rosebush in another question here. Please see that question response and things should be easily fixed. You did nothing wrong.
We have a rose bush that has been doing great for the last four years. This year all of a sudden the leaves started getting silver spots around holes on leaves. Now the bush looks like Swiss cheese or lace. We have checked the leaves and can't find any reason for the holes. Something is eating it. What do we do now?
It sounds like your rose bush is under attack by some type of beetle that feeds at night. I would recommend giving the rosebush a treatment of Bayer Tree and Shrub Granules. Apply per the label instructions for Ornamentals/Roses. This is a systemic disease and bug control product and it also has some food in it to help the bush under attack gain strength to help fight the attack. Spraying the rosebush may not work sometimes as the culprit hides well and thus the sprays have a hard time really getting to the problem, spray on systemics can have marginal success.
Can you fertilize miniature roses as soon as you plant them with a blossom booster, or should I wait for a couple of weeks? Also, what would help them flourish better at first?
Definitely hold off on any blossom booster fertilizers. In some cases I am not sure why they call them blossom boosters as their Nitrogen content is very high and that can lead to extreme foliage growth and limited to no blooms. ??? I would water in the new miniature roses with some water that has both a good root stimulator and a product called Super Thrive mixed into the same water. Give them this mix the next 3 to 4 times they need watering. It helps get the roots going well and the super thrive has vitamins and hormones in it that help the roses deal with transplant shock and any other stresses they are dealing with for optimum performance. Once they start forming new buds, give them a little organic or organic based rose food. Giving them a little kelp meal in three weeks after planting will be good too. Check the growth habits of the miniature roses you have too. Some can get pretty big as the word miniature refers to the size of the bloom and not necessarily the size of the bush itself.
When and how to prune roses?
Here is a link to an article on Deadheading roses for you as well:
https://www.gardeningknowhow.com/ornamental/flowers/roses/rose-deadheading.htm
Here is a link to an article I wrote on this topic for you. Let me know if you have further questions. Link: https://www.gardeningknowhow.com/ornamental/flowers/roses/pruning-roses.htm
Stan The Rose Man
Consulting Rosarian
Can you grow Blue Moon roses in patio tubs?
Hello and thank you for your question. Yes you can grow this fine hybrid tea rose in tubs on your patio. I recommend tubs that are at least 20 inches in diameter or similar size rectangular tubs. The tubs are best to be 20 to 24 inches tall/deep as well to properly support the root growth. Make sure the tubs have drain holes in the bottom or drill some there yourself. I use a 3/8 inch drill bit minimum to drill holes in mine as they are less likely to clog up. Then I place a layer of 3/4 inch gravel in the bottom of the pot, the gravel can be covered with landscape fabric that allows water passage prior to adding a good bagged amended planting soil. Enjoy those pretty lavender blooms!