Create Mushrooms ability:

Why doesn't these triggers work, I have these buildings, goblin huts, and want to spawn Mushrooms around them (The Underground-Tileset tree wall). They should only do this when the research is researched. Here below are the triggers I made, but they don't work.

This is the first one, made to recognise if a player has researched the upgrade:
__________________________________________________
Mushroom Farming Upgrade
Events
Unit - A unit Finishes research
Conditions
(Researched tech-type) Equal to Mushroom Farming
Actions
Trigger - Turn on Mushroom Farming <gen>
__________________________________________________
This is the trigger that get's activated by the above upgrade, that should create mushrooms:
__________________________________________________
Mushroom Farming
Events
Time - Every (25.00 + (Random real number between 5.00 and 35.00)) seconds of game time
Conditions
Actions
Unit Group - Pick every unit in (Units of type Goblin Hut) and do (Actions)
Loop - Actions
Destructible - Create a Dungeon Tree Wall at ((Position of (Picked unit)) offset by ((Random real number between -300.00 and 300.00), (Random real number between -300.00 and 300.00))) facing (Random angle) with scale (Random real number between 0.25 and 0.50) and variation (Random integer number between 1 and 8)
Destructible - Set life of (Last created destructible) to (Random real number between 25.00 and 50.00)%
_________________________________________________

Pls help me to get this working

A few questions:
1. Does the second trigger ever run? Assuming it does:
2. What is the base building? It might take up more space than 300 units so the mushrooms are being created under it (and thus unplaceable...or hidden).

And a suggestion:
Change the trigger to remove all of the random stuff, and just create one mushroom well (500/600 units) away from the farm when it's built, and in a constant direction. Then test the map and see if that mushroom is there. If it is, then you know the problem lies somewhere in the random stuff.

What do you mean with "does the second trigger ever run", it isn't initially on, but the first trigger activates it, and then it runs every 25+5-35 seconds of the game.

As far as i know, its impossible to make a periodic time event fire at random intervals. I've always used wait and run-trigger actions to acheive this effect (trigger has no event, just a wait and run - this trigger action a the end ofthe trigger witht eh random number generated by a variable.)

After you turn it on, does the second trigger ever execute?

I think it's better to use a timer variable.
in pseudocode:

Event:
<timer> expires
Actions:
.
.
.
Create a ONE SHOT timer that expires in 25.00 + (Random real number between 5.00 and 35.00).

In this manner you simulate a pseudo periodic event.