How many Summoning spells can you have

[Oliver McShade]

How many summoning spell can you have going at the same time.

I know that in past, we have played that you can have any number out. But this does not make since when you look at other spells and how they react when cast together.

Just Wondering if some people play Summon Creature spells using the Combining magic effects rule on page 208. As:

• Different Bonus Types
  
• Same Effect more than Once in Different Strengths
  
• Same effect with Differing Results
  
• One Effect Makes another irrelevant
  

[Matthew Morris]

AFAIK, you can 'summon spam' as much as you want. (Well as much as the DM/Other players will allow you before they get mad.)

[mdt]

You can have as many as you want.

Just as you can cast Endure Elements multiple times to cover multiple people. Theoretically, you couldn't summon the exact same creature multiple times, but that would require a feat from 3.5 to summon the same creature each time, or a prestige class.

Each Summon summons a different creature or set of creatures. You might summon 1d4 wolves twice, but you're getting two different sets of wolves. The spells you are talking about that don't stack don't stack on the same target. Spells can be cast on different targets simultaneously (see above example).