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Lemon Tree Pollination by Hand – How to Pollinate Lemons

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Growing your own lemon trees at home is a truly refreshing gardening activity. Learn to do lemon tree pollination by hand to grow the most lemons possible.

Hand pollinating a lemon tree flower with a fallen blossom
Hand pollinating a lemon tree flower with a fallen blossom – this bloom got knocked off in our house so I made good use of it!

In case you hadn’t heard – something I’ve done recently is buying way too many citrus trees! We live in the northeast and up here in Zone 6b, it is too cold for them to survive winters outside. Anyway, I decided to learn how to hand pollinate lemon trees with a paintbrush so we can hopefully enjoy some fruit!

I planted lemon trees from seed and also purchased a lemon tree in bloom in September 2022. Amazingly, the lemon tree that I purchased was bursting with blooms and even had a baby lemon on it already.

Lemon tree flowers are amazingly fragrant and fill the whole home – or at least the first floor – with a delightful, flowery aroma.

When to Hand-Pollinate Lemon Trees

A few clues make it easy to figure out when to get started on lemon tree pollination. Pay attention to when the flowers open and notice when the stigma in the center looks a bit shiny or sticky. That’s a great time to hand pollinate lemon trees.

How to Pollinate Lemon Trees by Hand

Pollinating lemon trees by hand requires only a few seconds here and there. You will need a paintbrush, Q-tip, or bird feather to transfer pollen.

Do your own indoor lemon tree pollination with these simple steps:

  1. Use a small paintbrush to gather pollen from a lemon flower. You should see pollen on the tiny anthers on top of the filaments that stick out around the center.
  2. Gently dab the pollen you’ve collected onto the stigma. This is the piece sticking out of the center of the lemon tree flower.
  3. Make multiple pollen transfers. In case pollen isn’t ready, touch a few stamens to gather pollen. Then, continue hand pollinating the centers of the citrus flowers.

If you do not have a small paint brush to use, you may also use a bird feather or a cotton swab.

What Happens Next

After flowering, petals and parts of the flower will drop as the lemon flowers age. After successful fertilization, you should notice a tiny green lemon begins growing where the flower once was.

All flowers may not make it to fruit stage, but proper care for your lemon tree should maximize the chances.

Tips on Hand Pollinating Lemon Trees

If you are new to growing citrus, you may benefit a quick summary of lemon tree pollination via these handy bullet points.

  • Tools – Use a small paint brush, Q-tip, or bird feather to transfer pollen from the answers to the stigma.
  • Maintenance – Wash the paintbrush in between uses, especially if you use it to hand pollinate other plants.
  • Indoor Lighting – Give your lemon tree good supplemental lighting if it is living indoors.
  • Watching & Watering – Make sure to water adequately and watch for pests and other issues that could hurt your lemon crop.
  • Use Caution – Be aware that lemon trees have thorns and you should use caution when pollinating by hand to avoid getting stabbed.
Indoor lemon tree flowering with large cluster of blooms
Our new Meyer lemon tree from Levengood’s Flowers flowering in Fall 2022

Outdoor Lemon Tree Pollination

If you live in a climate where your lemon tree can live outdoors all year, you may not need to hand pollinate lemon trees yourself. Pollination can occur naturally thanks to the bees and other pollinators.

  • Bees – Set your lemon tree outside where bees can access it and do the work for you! Avoid using pesticides that harm pollinators.
  • No Bees – If you see no bees or pollinators, you may use the same steps for hand pollination for indoor trees.

Indoor Lemon Tree Pollination by Hand

When you live in a climate too cold to leave lemon trees outdoors all year, try hand pollinating your lemon trees.

Manually pollinate lemon flowers with a soft tool such as a paintbrush, feather, or cotton swab.

  • Repeat the Process – Manually pollinate lemon tree flowers a couple times on different days. This allows you to catch the pollen and the stigmas at different intervals in their lifecycle and should increase chances of successful fertilization.
  • Keep Track –If you wish to track the journey, note the days that you manually pollinate the trees on your calendar.
  • Anticipate Fruit Drop – Often trees will drop fertilized flowers if they cannot support the weight or strain of all that’s happening at once.
  • Consider Thinning – If your tree struggles, consider lightening its load by thinning a few flowers on heavily pollinated branches. Thinning citrus isn’t always necessary, just use discretion.

Lemon trees in pots often do well going back and forth indoors and outdoors to survive the seasons. Monitor your tree’s health and consider joining a good online citrus tree group for additional support!

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Why isn’t my lemon tree flowering?

If your lemon tree is not flowering, it could be due to several factors. First, consider that lemon trees often do not produce fruit until they are at least 3 to 6 years old. Also, your trees may benefit from citrus fertilizer to help encourage blooming and better foliage.

It is not uncommon for tiny pollinated lemons to drop from the tree. This may happen if the tree cannot support all of the lemons that are currently growing. It could also be due to nutritional imbalances or other issues with your lemon tree

Manually Pollinating Indoor Lemon Trees

If you are successful at lemon tree pollination, you should be able to enjoy your lemons about 6 to 9 months later when they are fully ripe. Expect it to feel like forever as you wait for those gorgeous lemons to turn yellow on the tree. 🙂

If you live in a colder climate like we do, your lemon trees need to come in before the big frost or freeze. It helps to learn how to pollinate lemon trees by hand so you can make the most of your indoor citrus grove.

The process is quick, easy and painless, and I hope it brings you many lemons for lemonade (like our yummy blueberry lemonade recipe) or lemon sugar cookies!

Baby lemon on a lemon tree
Baby lemon on a Meyer lemon tree in 2022

If you enjoyed this post, you might also like to see my post on germinating lemon seeds and growing your own baby lemon trees at home. My trees are doing amazingly well after several years since planting. 

Happy Gardening!

11.03.22 – Updated to add photo of baby lemon growing on the lemon tree and added trees for sale.

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