Recently I got hold to a large allot in which I started to grow my own biological vegetables and fruits.
It's quite a charming place with old fruit trees and an old wooden greenhouse. One part (about 50m2) I want to dedicate to psychoactive herbs and plants. Cannabis is not allowed in the properties rules.

As I live in the Netherlands with cold winters a lot of plants won't grow.

I did some reading and found the following plants can be grown in N-European climates:

-Morning glory
-Datura (not quite sure if this one is usefull as I don't like deleriums)
-Wild Lettuce (also supposed to be a atropine containing delerium)
-Wild dagga
-Papaver
-Catnip
-St John's wort
-Passion Flower
-Geraniums

Never thought I would got hold to an allot but I really like to get the rest and dirty hands after a busy week and the learning process of growing plants is quite rewarding. Also the people at the place are very helpful in giving advice and seedlings. Always thought it were only people over 60 doing this but i'm amazed how many people of my age (early thirties) and younger are having an allot.

Any advice for some more plants which can grow here would be more than welcome. Maybe any DMT containing species?

- Desmanthus
- Phalaris
with a clear plastic greenhouse during winter i think other things could be possible, as Heimia, Peganum, Salvia or even cacti.

Thanks.
There is an old wooden/glass greenhouse. No electricity so heating is no option and winter temperatures will be almost the same inside the greenhouse. It will be a protection for rain and snow though. I read somewhere a guy had growing peruvian torches in denmark in a greenhouse. They survived freeze colds with coffeecups on the tips and no watering during winter. Maybe I'll try to put some of my 3 year old cacti in the greenhouse as an experiment to see how well they cope with the cold. One problem might be theft of those cacti by someone how nows their purposes .
I'll read a bit about desmanthus and phalaris what they are used for.

Cacti if kept dry can survive very cold winters: i've read growers do that in northern Italy.

what temps do you get?

from your list grow these as annuals:
-Morning glory
-Datura - if you dont like deleriants, avoid them. they are very pretty though, and a little cold hardy.
-Wild Lettuce (also supposed to be a atropine containing delerium)
-Wild dagga
-Papaver
-Catnip
-St John's wort


-Geraniums - Commonly wintered in basements/garages in North America, so you could do that as well. The roots stay alive jsut fine in cold temps, but dont let rot.


Not super cold hardy, but takes some
-Passion Flower

Thanks for the advice. Temps come as cold as 5 F (although not too long) to 80-90 F in summer.

Yesterday I ordered the following seeds:

Desmanthus illinoensis, Illinois Bundleflower
Nepeta cataria, Catmint
Scutellaria laterifolia, Skullcap
Papaver somniferum, Garden poppy
Leonotis leonurus, Wild Dagga
Eschscholzia californica, California poppy
Leonurus sibiricus, Marihuanilla

For st John's wort and wild lettuce couldn't find a supplier yet.

Also tommorow I'm going to pick up two older Salvia divinorum's which are going to sit in the greenhouse during the summer and taken home in winter,

There are already lots of geraniums in the allot from the previous owner. Would be great to try to extract geranium oil from that. I once bought some geranamine and I found it a better stimulant than caffein.

Also read a bit about but Coleus on the net and here on the forum, but it it's very hard to make up if they are active or not. There are some reoprts on erowid but it seems that there never has been succesfull isolation of alkaloids from it. So possibly those reports are placebo mind trips.

My advice is not to waste time and effort with coleus.

Ok thanks man. Saves some time sourcing those down. Did you have personal experience with Coleus?

Yes , i grew it once.
But more than my experience we must benefit from the opinion of qualificated members here (as Al.K.Loiyd) .

Is it a Greenhouse separate from your house or is it a greenhouse built to one side of your house?
Maybe you could blow some excess heat from your house through filters, then through plastic tubes, into the greenhouse?

maybe cover the glass greenhouse walls with a loose, double/triple layer of transparent plastic foil for some simple, cheap isolation to keep heat from leaking?

I have also considered a greenhouse for Entheogenic plants to survive the cold, sunless winters here. I thought of placing several mirror tiles in the Greenhouse,
to perhaps amplify/focus the available sunlight in the greenhouse.

On my balcony my Datura Inoxia grew from early summer to late autumn. Then I had to put it indoors and it caught a fungus and died.
I wonder how long my Datura would last if I kept it in such a Greenhouse.
My San Pedro cactus grows very slow but steadily
I bet my San Pedro Cactus would grow very well in such a greenhouse, allthough it would need a dehumidifyer.

O how I wish I had a garden =(

^A white reflective material will work better than mirrors for reflecting light.

The greenhouse is on an allot without electricity or heat sources nearby.

The garden is getting shape. Lots of veggies and a seperate part for the experimentals. From the tips I got here I have the following growing in the garden and some still in an incubator at home:

- Desmanthus. These young plants are amazing how they fold when the evening falls. They pop from the seeds in 48 hours.
- Leonotis Sibiricus and Leonoris. Very fast growers. Probably because we got an amazing warm spring in the Netherlands this year.
- Catnip. Very easy grower.
- Skullcap. Still in the incubator as they grow quite slow. Also I read that they ae quite difficult to raise. Hope they can be in the garden soon.
- California poppy. Quite easy so far.
- Papaver somniferum. Seeded throughout the borders alongside several other papaver species.
- Wild lettuce. Just arrived in seeds and waiting to meet the light.
- St Johns worth. Got it as a plant and does it very well after planting.
- Ipomea. The heavenly blue and purpera. Grows very fast from seed. Made a wooden arches on which they climb to reach the sun.

In the greenhouse I putted three of my trichocereus cacti. I'll let them stay in the winter too as an experiment to see if they can take the cold winters here without watering.
Also trying to grow the HBWR in the greenhouse but don't expect it to work as hawai is not really comparable to this cold winter place. Also an old grape and peppers, tomatoes, cucumbers and courgettes are growing in the greenhouse.

Also a part is dedicated to all kind of spices (cooking spices )

During the general housekeeping work day at the allot I met a guy and his girlfriend who are into psychedelics and medicinal herbs as well which is great as now we can exhange seeds/plants experiences and have a bbq together now and then. He also introduced me to Yerba Mate which I now drink regularly instead of coffee.

So far my girl and I really enjoy the gardening. It's so rewarding to see the plants come to life. Also most people at the complex have a good mindset and are very helpful in giving advice.

A friend of mine did that and the cacti died cause the humidity of the greenhouse. You can keep the cacti in the greenhouse during winter, but it has to be ALWAYS dry air inside; in other words you can't keep together cacti and other vegetables that need watering because this creates too much moisture : you need a separate greenhouse for cacti and succulentes.

And why during this good warm season you keep the trichs inside? Because you fear thieves ?
It's dangerous: with hot weather, inside the greenhouse it is forming even more moisture !

Hi Gazal, thanks for that tip. I wasn't aware of the humidity could harm them in summer. I'll put them in pots outside and move them in, in winter. Theft I'm not afraid of. If that happens it happens, it's quite remote from the city and most people won't be aware of the usage.

In any case a window or a vent to improve air circulation when needed has to be provided building the greenhouse : on the opposite side of the door, in high position is better.

In winter I would put Peganum Harmala in the succulentes' greenhouse.

You could succesfully grow those cacti in an outdoor greenhouse.
You can make a special, sealed off, compartment for cacti and succulents in your green house.
Just bring down the humidity as much as possible to recreate a dessert climate.
You can hang up sponges on strings, to absord all moist out of the air.

Also make sure the pots in which the cacti grow is well drained. If you fill the bottom with coarse gravel,
the poor in the cactus-soil mix and finally add a toplayer of sand and gravel so water isn't too likely
to stay near the surface and get evaporated by solar heat.
Another way to drastically decrease feeding-water evaporisation into the air is to apply drip irrigration;
Put a PVC pipe into the Pot next to the cactus (carefull not to harm the root) till it's bottom end is
abt. 2/3ds down into the cacti-soil layer. Water is delivered deep, directly to the roots, preventing surface evaporation.

Finally you could also make a ventilation-system where dry air is sucked in and moist air is sucked out.
It would require a fan that blows air out if it's too moist in the greenhouse. Then another hole on the other end
of the cacti-compartment could be covered with a filter that absorbs all moist (and bacteria & fungi) out of the air.
If moist air is blown out through the fan-hole, filtered, dry air is atomatically pulled in through the moist-filter hole.
Like a slow, steady draft of dry air. It would require a tiny bit of electricity though, but nothing a solar-cell or
wind-generator can't solve.

A small update on my experiences with growing the above plants last year in the dutch climate:

- Desmanthus. These young plants are amazing how they fold when the evening falls. They pop from the seeds in 48 hours.

They didn't thrive very well in the clayish ground type. In a month time the plants were gone.

- Leonotis Sibiricus and Leonoris. Very fast growers. Probably because we got an amazing warm spring in the Netherlands this year.

They are very easily growable in cold climates. I got 2 metro high bushes in one season with lots of flowers. Both species did equally well. The effects of Leonotis are subtle but easily recognizable for those paying attention at it. It gives you a sharper view and sort of relaxing feeling.

- Catnip. Very easy grower.

Also very easily growable. I got no effect from it but my cats liked it a lot .

- Skullcap. Still in the incubator as they grow quite slow. Also I read that they ae quite difficult to raise. Hope they can be in the garden soon.

Surprisingly they did grow very well in the clay ground. It became bushes and its effect is very enjoyable with cannabis. It indeed multiplies the effect when smoked/ drinking a tea half an hour before smoking cannabis. This is definitely no placebo.

- California poppy. Quite easy so far.

Totally unsuccessful in full ground here. Probably because they actually can't be transported very well after sprouting.

- Papaver somniferum. Seeded throughout the borders alongside several other papaver species.

Not very good. Small seed pots not useable.

- Wild lettuce. Just arrived in seeds and waiting to meet the light.

Very good growers. They even survived the freezing cold in the winter and still are very healthy plants this year.

- St Johns worth. Got it as a plant and does it very well after planting.

Good plant but it didn't survive the winter I think. Have to see it if it recovers.

- Ipomea. The heavenly blue and purpera. Grows very fast from seed. Made a wooden arches on which they climb to reach the sun.

They did it very well. Lots of seeds were harvested of different Ipomea species,

So far my experiences with these plants. If anyone has good suggestions for this year grow, I would appreciate any tips.

The desmanthus is mostly useless for DMT..nice plant to grow though.. I would get some mimosa seeds going if I was you and just bring them indoors in winter. Mimosa trees are very easy to grow. Acacia obtusifolia, acuminata and floribunda you will want to look into also as they all tolerate the cold more than others..they might survive the winter outdoors even where you are..

Phalaris brachystachys as well..