The Negatives of Growing In Leca With Passive Hydroponics

I have never been able to get any plant grown using leca and passive hydro to last much longer than one year before succumbing to root rot. It requires constant flushing of the media to keep ahead of it, which is way too much work especially when you have most of your plants growing in tents, which make the plants hard to access. I have seen some gorgeous Hoyas grown in leca on Instagram, but I cannot seem to achieve the same results, and it is maddening. So while it worked out in the case of this undulata, I can hardly recommend it as a main course of growing.

Growing The Indonesian Clone of Hoya undulata Part Three

Despite my best attempts to prevent root rot, I did observe some rot in March or April, I pulled off as much of it as I could get at and used high pressure water to flush the leca of as many impurities as I could. I then saw that the growing tip died back, and thought well, here we go again, but surprisingly soon after the tip died back, it put on a peduncle near the end of the vine and actually started budding up!

Growing The Indonesian Clone of Hoya undulata Part Two

The plant went through the autumn and winter of 2020/2021 with slow but steady growth, sending up a vine in February. I was so afraid of root rot that I kept very little water in the reservoir letting the leca slightly dry out between waterings, which I flushed with a high pressure hose after every watering.

Growing the Indonesian Clone of Hoya undulata Part One

I had to make a decision on how to grow the plant after it arrived. It was rooted in coconut husk, and I opted to go with leca using the semi or passive hydro method of growing it. The only reason I chose that method was that I had killed Hoya undulata growing it in normal mixes. After a month, it still had not died so I felt maybe I had a chance at keeping it alive for a while!