Thanks for sending the additional information. Indian summer is listed as an ever-bearing raspberry meaning it has two bloom times spring and fall. However, most of the info that I found on this variety states it is Fall bearing.  
I am guessing that the plant is new and it may take a year for it to start bearing fruit. That said, you could add some phosphorus now (that's the middle number on a fertilizer bag) to improve your blooms for a possible fall batch of berries. The three numbers on the bag are always in the same order, nitrogen, phosphorus and potassium. Make sure the first number is low. You don't want more green leaves that the nitrogen will produce. You want blooms that the phosphorus will help create. Potassium helps with the metabolism of the plant. Look for organic fertilizer that has OMRI on the front of the package. That's a sign that it has been tested and found to adhere to the organic rules.  Always follow the directions on the package.
Great, no pesticides. If you have any disease or pest issues, please write back and we can assist you with written information on bio-controls or organic fungicides.
You may need some patience with this plant. Hopefully it blooms and sets fruit this fall.  
For next spring leave the strongest canes and fertilize early in the spring. Your plant should set blooms for a spring harvest. Remove damaged or dead canes. When looking for info on the web try: Indian summer raspberry site:.edu. That will give you information from universities instead of random garden information. The site:.edu should be typed exactly as shown. Good luck hope the raspberry harvest is tasty this fall.