How often should I harvest window box herbs?
Written by
Michael Sullivan
Reviewed by
Prof. Samuel Fitzgerald, Ph.D.Harvesting your window box herbs at the right time yields the best flavors and plant health. Early morning is best as essential oils are in their highest concentration in the leaves before being dissipated by the heat of the day. This timing ensures that the greatest aroma and potency are captured for cooking. Regular harvesting of the herb plants is also recommended to encourage new growth, which promotes bushier plants.
The frequency of harvesting will depend on the type of herb and growth rate. An herb that grows quickly, such as basil, should be harvested once a week. In contrast, slower-growing herbs, like rosemary, may only need to be harvested once a month. Always retain at least two-thirds of the plant's leaves. This will help the plants to re-establish rapidly and continue producing lush quantities of leaves.
Different herbs require various techniques to grow successfully. To encourage branching in basil and mint, pinch them just above the leaf nodes. Snip rosemary and thyme at a 45-degree angle just above the woody part of the stem. Never tear the stem, as this causes an opening for disease. Always use clean scissors when trimming to prevent the transfer of infection.
Pinch Method Herbs
- Basil: Pinch top leaves to prevent flowering
- Mint: Remove stem tips to encourage bushiness
- Oregano: Harvest tender new growth regularly
Snip Method Herbs
- Rosemary: Cut older woody stems above nodes
- Thyme: Trim stems before they become woody
- Lavender: Harvest flower spikes with long stems
Special Considerations
- Parsley: Cut outer leaves first allowing center growth
- Chives: Harvest 2 inches above soil level
- Cilantro: Pick leaves before bolting occurs
Modifications in harvesting methods arise seasonally. Summer requires more frequent picking due to the rapid growth of plants, whereas winter requires less picking because of the diminished growth. Also, reduce the frequency of picking in periods of excessive heat to prevent the plants from suffering. By observation, the frequency of picking can be modified.
Post-harvest maintenance extends productivity; award plants immediately after picking to keep the plants from experiencing stress. Add diluted fish fertilizer with every watering during the months when production is heavy. Remove any yellow leaves at once. Care of this type keeps the plants in production the entire growing season.
Correct harvesting practices change window box gardening into a sustainable system. Plants reward slow and careful harvesting with vigorous regrowth. Your kitchen and cooking flavor will be enriched, while the herbs thrive. Learning these techniques will provide you with a wealth of material for creating your own homegrown seasoning.
Read the full article: 10 Best Window Box Herbs for Your Kitchen
