Controlling more actuators

Hello everybody, I'm very new in Arduino programming and I'm having some problems in my automated greenhouse.

I'm trying to control the environment through sensors and actuators but something goes wrong. The question is: how can I make my Arduino Uno control two sensors (Temp/hum and luminosity) and three actuators (water pump, LEDs and ventilation fan)? Do I have to use relays?

Please help me to think about what I have to do.

I have just one week!

Thanks

Rubinia: I have just one week!

Why? Are the plants almost dead? Better hire someone to water them.

the greenhouse must be completely automated.
For what concerns the sensors, I have no problem to wire them to the Arduino and get data on the pc.

Problems come up with the actuators: how can I wire them to the same Arduino Uno and power them?

guys please help me! I must finish this project in one week.

please,please,please...

Well it's been 24 hours and no-one has replied. Why? Because you posted virtually no information.

how can I make my Arduino Uno control two sensors (Temp/hum and luminosity) and three actuators (water pump, LEDs and ventilation fan)?

What sensors? What actuators? Post links to them. How are they to be controlled? Time? Readings? What readings?