Pine Needle Peony Cactus: A Record of Growth from Seed to Maturity
Compared to the content about the Pine Needle Peony Cactus that most people know, this record of raising the cactus from seed to adulthood is detailed below for your reference by the editor.
This article documents a New Zealand flower enthusiast's successful journey of raising a Pine Needle Peony Cactus from seed, as well as some general precautions for growing the plant in New Zealand. The flowering plant shown in the picture is two years old.
The germination rate of Pine Needle Peony is very low, and the seedlings appear sickly. However, this one survived and grew well, with 100% humidity in the first year, kept in a pot inside a plastic bag, and illuminated by fluorescent lights. This is our standard method for handling young plants of difficult-to-grow species.
The Pine Needle Peony is a self-rooted seedling (we do not plant grafted ones) and is planted in a standard soil mixture that is quite different from what most flower enthusiasts use. One-third of the pot bottom is filled with lightweight stones (with many pores). The remaining part consists of small lightweight stones, crushed lightweight stones, granite sand, and organic matter, each taking up one part. The organic matter is a commercial product made from composted tree bark, fish, and slaughterhouse waste. We sieve out large chunks with a 3mm sieve, using only the material smaller than 3mm.
Some New Zealand flower enthusiasts do not like to use lightweight stones, even though they are easily available in this volcanic country. They believe that lightweight stones retain water well, which means less frequent watering is needed. For seedlings, we use the soaking method, and in other cases, we soak with a very dilute fertilizer solution (phosphate fertilizer mixed with urea). For mature plants, we apply Ogreen fertilizer, watering from the top of the plant, with an efficacy lasting up to nine months.
After watering, the growing medium is allowed to dry out completely, which usually takes 3-6 weeks. Lightweight stones are very light, making it easy to determine if they are completely dry.
Seedlings are taken out of the plastic bag every day and placed in a location with only scattered light for a few hours. They are only moved to a brighter environment when they show signs of needing more light, which is indicated by yellowing. Pine Needle Peony seems unique in the genus, as it never shows any signs of needing more light, so it is always kept in low light. Compared to the lighting conditions in the UK, low light needs to be applied with caution. In Nelson, New Zealand, we have more sunshine than any place in the UK because our latitude is equivalent to Madrid, not Birmingham.
Nelson has a natural large temperature difference compared to the UK, and the humidity is very low. For example, we do not usually encounter condensation on the inside of glass windows. Cacti often experience temperature differences as high as 20°C. Nighttime temperatures in winter can drop to 1°C, quickly rising again during the day. We do not use artificial heating unless seedlings are being cared for on a heating mat. Heating is turned off at noon and on again at dawn. Therefore, seedlings do not experience low temperatures and maintain growth throughout winter and summer.
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