diff --git a/code/modules/hydroponics/seed.dm b/code/modules/hydroponics/seed.dm
index c11d46154f2..9d023c52c48 100644
--- a/code/modules/hydroponics/seed.dm
+++ b/code/modules/hydroponics/seed.dm
@@ -243,39 +243,49 @@
 		origin_turf.visible_message("<span class='danger'>The [thrown.name] splatters against [target]!</span>")
 		del(thrown)
 
-/datum/seed/proc/handle_environment(var/turf/current_turf, var/datum/gas_mixture/environment, var/light_supplied, var/check_only)
+/datum/seed/proc/handle_environment(var/turf/current_turf, var/datum/gas_mixture/environment, var/light_supplied, var/obj/item/weapon/tank/holding, var/check_only)
 
 	var/health_change = 0
-	/*
-	// Handle gas consumption.
-	if(consume_gasses && consume_gasses.len)
-		var/missing_gas = 0
-		for(var/gas in consume_gasses)
-			if(environment && environment.gas && environment.gas[gas] && \
-			 environment.gas[gas] >= consume_gasses[gas])
-				if(!check_only)
-					environment.adjust_gas(gas,-consume_gasses[gas],1)
-			else
-				missing_gas++
 
-		if(missing_gas > 0)
-			health_change += missing_gas * HYDRO_SPEED_MULTIPLIER
-	*/
+	if(!environment)	//Someone called this without passing an environment. Punish their plant.
+		return -100
 
 	// Process it.
-	var/pressure = environment.return_pressure()
+	var/pressure
+	if(holding)		//Check if we are running from an internal source (portable tank)
+		//Use the tank's distribution pressure or it's internal pressure (whichever is lower) for pressure checks
+		pressure = min(environment.return_pressure(), holding.distribute_pressure)
+	else			//Not using an internal source
+		pressure = environment.return_pressure()
 	if(pressure < get_trait(TRAIT_LOWKPA_TOLERANCE)|| pressure > get_trait(TRAIT_HIGHKPA_TOLERANCE))
 		health_change += rand(1,3) * HYDRO_SPEED_MULTIPLIER
 
 	if(abs(environment.temperature - get_trait(TRAIT_IDEAL_HEAT)) > get_trait(TRAIT_HEAT_TOLERANCE))
 		health_change += rand(1,3) * HYDRO_SPEED_MULTIPLIER
 
-	/*
+	// Handle gas consumption.
+	if(consume_gasses && consume_gasses.len)
+		var/missing_gas = 0
+		for(var/gas in consume_gasses)
+			if(environment && environment.vars[gas] && environment.vars[gas] >= consume_gasses[gas])
+				if(!check_only)
+					environment = adjust_gas(environment, gas,-consume_gasses[gas])
+			else
+				missing_gas++
+
+		if(missing_gas > 0)
+			health_change += missing_gas * HYDRO_SPEED_MULTIPLIER
+
 	// Handle gas production.
 	if(exude_gasses && exude_gasses.len && !check_only)
 		for(var/gas in exude_gasses)
-			environment.adjust_gas(gas, max(1,round((exude_gasses[gas]*(get_trait(TRAIT_POTENCY)/5))/exude_gasses.len)))
-	*/
+			environment = adjust_gas(environment, gas, max(1,round((exude_gasses[gas]*(get_trait(TRAIT_POTENCY)/5))/exude_gasses.len)))
+
+	//Handle heat adjustment
+	if(get_trait(TRAIT_ALTER_TEMP))
+		environment.temperature += get_trait(TRAIT_ALTER_TEMP)
+		if(environment.temperature < 0)		//Make sure we didn't drop below absolute zero
+			environment.temperature = 0		//Set temperature back to zero if we did
 
 	// Handle light requirements.
 	if(!light_supplied)
@@ -291,6 +301,35 @@
 
 	return health_change
 
+//Screw it, making a new proc for this for the sake of readability or something. --FalseIncarnate
+/datum/seed/proc/adjust_gas(var/datum/gas_mixture/environment, var/gas, var/amount = 0)
+	if(!environment || !gas)	//no gas_mixture or gas defined to adjust
+		return
+
+	var/transfer_moles = environment.total_moles()
+	var/datum/gas_mixture/temp_holding
+	if(transfer_moles <= 0)		//Check if the transfer_moles is an unacceptable value for the remove proc
+		//The environment is empty (or somehow has negative moles), create a new gas_mixture for temp_holding
+		temp_holding = new /datum/gas_mixture()
+		temp_holding.temperature = T20C
+	else
+		//The environment is acceptable, transfer it's contents into temp_holding
+		temp_holding = environment.remove(transfer_moles)
+
+	if(!temp_holding)	return	//Just in case temp_holding has somehow avoided being set
+
+	switch(gas)
+		if("oxygen")
+			temp_holding.oxygen += amount
+		if("nitrogen")
+			temp_holding.nitrogen += amount
+		if("carbon_dioxide")
+			temp_holding.carbon_dioxide += amount
+		if("toxins")
+			temp_holding.toxins += amount
+
+	return environment.merge(temp_holding)
+
 /datum/seed/proc/apply_special_effect(var/mob/living/target,var/obj/item/thrown)
 
 	var/impact = 1
@@ -361,12 +400,12 @@
 
 	if(prob(5))
 		consume_gasses = list()
-		var/gas = pick("oxygen","nitrogen","plasma","carbon_dioxide")
+		var/gas = pick("oxygen","nitrogen","toxins","carbon_dioxide")
 		consume_gasses[gas] = rand(3,9)
 
 	if(prob(5))
 		exude_gasses = list()
-		var/gas = pick("oxygen","nitrogen","plasma","carbon_dioxide")
+		var/gas = pick("oxygen","nitrogen","toxins","carbon_dioxide")
 		exude_gasses[gas] = rand(3,9)
 
 	chems = list()
diff --git a/code/modules/hydroponics/seed_datums.dm b/code/modules/hydroponics/seed_datums.dm
index d39d315bdb3..e1eb5c8681b 100644
--- a/code/modules/hydroponics/seed_datums.dm
+++ b/code/modules/hydroponics/seed_datums.dm
@@ -1236,6 +1236,7 @@
 	seed_name = "test"
 	display_name = "test trees"
 	chems = list("omnizine" = list(1,20))
+	consume_gasses = list("oxygen" = 5)
 
 /datum/seed/test/New()
 	..()
@@ -1249,3 +1250,20 @@
 	set_trait(TRAIT_PRODUCT_COLOUR,"#BB6AC4")
 	set_trait(TRAIT_PLANT_ICON,"tree")
 	set_trait(TRAIT_EXPLOSIVE, 1)
+
+/datum/seed/test2
+	name = "test2"
+	seed_name = "test2"
+	display_name = "test2 trees"
+	exude_gasses = list("toxins" = 5)
+
+/datum/seed/test2/New()
+	..()
+	set_trait(TRAIT_HARVEST_REPEAT,1)
+	set_trait(TRAIT_MATURATION,1)
+	set_trait(TRAIT_PRODUCTION,1)
+	set_trait(TRAIT_YIELD,4)
+	set_trait(TRAIT_POTENCY,15)
+	set_trait(TRAIT_PRODUCT_ICON,"treefruit")
+	set_trait(TRAIT_PRODUCT_COLOUR,"#BB6AC4")
+	set_trait(TRAIT_PLANT_ICON,"tree")
diff --git a/code/modules/hydroponics/seed_packets.dm b/code/modules/hydroponics/seed_packets.dm
index 3a2afb74f2a..687bb7fbb78 100644
--- a/code/modules/hydroponics/seed_packets.dm
+++ b/code/modules/hydroponics/seed_packets.dm
@@ -287,6 +287,9 @@ var/global/list/plant_seed_sprites = list()
 /obj/item/seeds/test
 	seed_type = "test"
 
+/obj/item/seeds/test2
+	seed_type = "test2"
+
 /obj/item/seeds/stobaccoseed
 	seed_type = "stobacco"
 
diff --git a/code/modules/hydroponics/spreading/spreading_growth.dm b/code/modules/hydroponics/spreading/spreading_growth.dm
index 6b589427b2e..c360ba5c0e1 100644
--- a/code/modules/hydroponics/spreading/spreading_growth.dm
+++ b/code/modules/hydroponics/spreading/spreading_growth.dm
@@ -45,7 +45,7 @@
 	// Handle life.
 	var/turf/simulated/T = get_turf(src)
 	if(istype(T))
-		health -= seed.handle_environment(T,T.return_air(),null,1)
+		health -= seed.handle_environment(T,T.return_air(),null,null,1)
 	if(health < max_health)
 		health += rand(3,5)
 		refresh_icon()
diff --git a/code/modules/hydroponics/trays/tray.dm b/code/modules/hydroponics/trays/tray.dm
index 2dae36c58d0..9e727f62bcb 100644
--- a/code/modules/hydroponics/trays/tray.dm
+++ b/code/modules/hydroponics/trays/tray.dm
@@ -740,6 +740,16 @@
 			A.icon_state = src.icon_state
 			A.hydrotray_type = src.type
 			del(src)
+	else if ((istype(O, /obj/item/weapon/tank) && !( src.destroyed )))
+		if (src.holding)
+			user << "\blue There is alreadu a tank loaded into the [src]."
+			return
+		var/obj/item/weapon/tank/T = O
+		user.drop_item()
+		T.loc = src
+		src.holding = T
+		update_icon()
+		return
 	else if(O && O.force && seed)
 		user.visible_message("<span class='danger'>\The [seed.display_name] has been attacked by [user] with \the [O]!</span>")
 		if(!dead)
diff --git a/code/modules/hydroponics/trays/tray_process.dm b/code/modules/hydroponics/trays/tray_process.dm
index d16ca75cc97..cf8087ae6bd 100644
--- a/code/modules/hydroponics/trays/tray_process.dm
+++ b/code/modules/hydroponics/trays/tray_process.dm
@@ -62,6 +62,8 @@
 	var/datum/gas_mixture/environment
 	// If we're closed, take from our internal sources.
 	if(closed_system && (connected_port || holding))
+		if(holding)
+			air_contents = holding.air_contents
 		environment = air_contents
 	// If atmos input is not there, grab from turf.
 	if(!environment && istype(T)) environment = T.return_air()
@@ -69,10 +71,12 @@
 
 	// Seed datum handles gasses, light and pressure.
 	if(mechanical && closed_system)
-		health -= seed.handle_environment(T,environment,tray_light)
+		health -= seed.handle_environment(T,environment,tray_light, holding)
 	else
 		health -= seed.handle_environment(T,environment)
 
+	T.air_update_turf()
+
 	// If we're attached to a pipenet, then we should let the pipenet know we might have modified some gasses
 	if (closed_system && connected_port)
 		update_connected_network()
diff --git a/code/modules/hydroponics/trays/tray_tools.dm b/code/modules/hydroponics/trays/tray_tools.dm
index 7d69104e2b0..d3db34ec060 100644
--- a/code/modules/hydroponics/trays/tray_tools.dm
+++ b/code/modules/hydroponics/trays/tray_tools.dm
@@ -166,6 +166,18 @@
 
 	dat += "It thrives in a temperature of [grown_seed.get_trait(TRAIT_IDEAL_HEAT)] Kelvin."
 
+	if(grown_seed.consume_gasses && grown_seed.consume_gasses.len)
+		for(var/gas in grown_seed.consume_gasses)
+			if(gas == "carbon_dioxide")	gas = "carbon dioxide"
+			if(gas == "toxins")	gas = "plasma"
+			dat += "<br>It requires an environment rich in [gas] gas to thrive."
+
+	if(grown_seed.exude_gasses && grown_seed.exude_gasses.len)
+		for(var/gas in grown_seed.exude_gasses)
+			if(gas == "carbon_dioxide")	gas = "carbon dioxide"
+			if(gas == "toxins")	gas = "plasma"
+			dat += "<br>It releases [gas] gas as a byproduct of it's growth."
+
 	if(grown_seed.get_trait(TRAIT_LOWKPA_TOLERANCE) < 20)
 		dat += "<br>It is well adapted to low pressure levels."
 	if(grown_seed.get_trait(TRAIT_HIGHKPA_TOLERANCE) > 220)
@@ -213,7 +225,7 @@
 	if(grown_seed.get_trait(TRAIT_PARASITE))
 		dat += "<br>It is capable of parisitizing and gaining sustenance from tray weeds."
 	if(grown_seed.get_trait(TRAIT_ALTER_TEMP))
-		dat += "<br>It will periodically alter the local temperature by [grown_seed.get_trait(TRAIT_ALTER_TEMP)] degrees Kelvin."
+		dat += "<br>It will periodically alter the local temperature by [grown_seed.get_trait(TRAIT_ALTER_TEMP)] Kelvin."
 
 	if(grown_seed.get_trait(TRAIT_BIOLUM))
 		dat += "<br>It is [grown_seed.get_trait(TRAIT_BIOLUM_COLOUR)  ? "<font color='[grown_seed.get_trait(TRAIT_BIOLUM_COLOUR)]'>bio-luminescent</font>" : "bio-luminescent"]."