Tools and Materials
Key Takeaways
- Use a balanced or organic fertilizer and avoid products with a high urea content.
- Always dilute fertilizer to half or quarter strength to prevent root damage.
- Water your orchid before fertilizing to reduce the risk of root burn.
- Fertilize every one to two weeks during active growth and reduce feeding in the fall and winter.
- Avoid fertilizing when orchids are dormant, stressed or in full bloom.
How to Fertilize Orchids
Fertilizing orchids helps them grow strong and produce vibrant flowers. Orchids have specific needs, but with attention and care, they’ll reward you with stunning blooms.
Step 1: Choose the Right Fertilizer
When buying fertilizer, look for one that’s organic, slow-release or balanced (20-20-20), meaning it contains equal amounts of nitrogen, phosphorus and potassium. Avoid high-nitrogen, rapid-release agricultural fertilizers since they contain too much urea.
Always wear nitrile gloves when handling fertilizer.
Avoid fertilizers where urea or urea-formaldehyde is listed first in the nitrogen breakdown as this can damage orchid roots. When shopping for fertilizer, look for “Urea-free” on the label.
Step 2: Dilute the Fertilizer
Dilute the fertilizer to half or quarter strength of what is recommended on the bottle. Orchids are sensitive to concentrated solutions.
Start with a mild fertilizer solution. If your orchid is doing well, you can slowly increase its strength.
Step 3: Water the Orchid First
Before fertilizing, water the orchid with plain water. This hydration prevents root burn, which can happen when the roots absorb too much of the fertilizer too quickly.
Step 4: Fertilize the Orchid
Pour the diluted fertilizer evenly through the potted soil and allow it to drain completely. Don’t let the plant sit in standing water.
Step 5: Monitor Your Orchid’s Health
After fertilizing, keep an eye on your orchid. Healthy plants will have vibrant green leaves and bright blooms. If the leaves turn yellow or the plant looks weak, it may be getting too much fertilizer or an unsuitable type. Adjust as needed to keep your orchid thriving. Caring for orchids takes a little patience, but with the right steps, it’s easy to keep them healthy and blooming.
When to Fertilize Orchids
Orchids need the most nutrients during their active growth period, which is usually during spring and summer. Fertilize them every one to two weeks during this time. The perfect time to fertilize is when you see new leaves, root tips or growth.
The best time to fertilize is immediately after watering your orchid. This allows the roots to absorb nutrients without the risk of damage. Never fertilize a dry orchid; always hydrate it first.
During fall and winter, when orchids enter a resting phase, reduce fertilization to once a month. However, if you notice that the orchid is dormant and there’s no growth at all, stop fertilizing completely.
Try Organic Fertilizers
Organic options like compost, worm castings or specially formulated orchid fertilizers are great alternatives. Apply them once every four to six weeks during the growing season. Since they’re gentle on roots, they promote long-term health and are beneficial for your orchid’s overall well-being.
When You Shouldn’t Fertilize Orchids
- Don’t fertilize orchids when they’re in full bloom as this could lead to premature bloom drop, put stress on the plant and cause buds to fail to open.
- If the orchid develops a white crust on the potting soil, stop fertilizing and flush it with water.
- Don’t fertilize if the plant is dormant and there’s no new growth (spikes, roots or leaves). At this stage, the orchid doesn’t need any extra nutrients.
- If the orchid is diseased, suffering from root damage or otherwise stressed, don’t fertilize it.
Fertilizing Orchids FAQ
Here are questions asked about how to fertilize orchids that may help you as you learn more about fertilizing orchids.
How Often Should I Fertilize My Orchid?
During their active growth, in spring and summer, fertilize every one to two weeks. In fall and winter, reduce feeding to once a month or stop fertilizing the orchid if the plant is dormant.
What Kind of Fertilizer is Best for Orchids?
A balanced fertilizer (like 20-20-20) or a gentle organic option works well. Avoid fertilizers high in urea, as they can damage orchid roots.
Should I Water My Orchid Before Fertilizing?
Yes, you should always water your orchid first to prevent root burn and help the plant absorb nutrients more safely.
Can You Over-Fertilize An Orchid?
Yes. Over-fertilizing can cause root damage, yellowing leaves and salt buildup in the potting mix. You should always use a diluted solution and feed the orchid lightly.
Do I Need to Fertilize Orchids When They’re Not Growing?
No. If your orchid is dormant and it’s not producing new leaves, roots or spikes, it doesn’t need fertilizer.