All libraries will be closed Friday, April 18th and Sunday, April 20th for our Spring Holidays.

Master Gardener – Search

Master Gardener

Virtual Help Desk

Get help straight from two Master Gardeners

Searching: watering

If you don't see the answer you're looking for, try submitting your question.

Lawn options-seed or sod

    Date Posted: Wed, Aug 18 - 2:00 pm

    Question

  • I’m trying to decide what to do about my front lawn. It’s a little under 60 square yards. Everything is killed off and tarps are covering the ground now to keep weeds from growing. There is no shade, all day sun. I would like to know if Tall Fescue is the best choice and also should I seed or sod. Cost is not the issue since it’s a small area. I hope you can give me some advice.
  • Answer

  • Well, I know you didn’t ask this but what about foregoing a lawn and planting a dooryard garden instead?. I’m not much of a grass person. A patch of clover is more to my liking, at least it gives the honey bees a place to land, adds some nitrogen to the soil. Maybe a combination of a lovely shrub border, a small tree, a mix of tall and low-growing perennials, groundcovers? Since it's a small area the expense wouldn’t be staggering and you can always phase in the plantings. Something to consider.... That being said, I think you’re doing a good job of preparing for a fall planting by covering the space and killing off the weeds. If I haven't persuaded you to take a different approach, I’ll try to answer your question about seed or sod. You didn't mention why your lawn was "killed off". Is there an issue with the soil? If so, you should request a soil test kit from the Richmond VA Cooperative Extension Main Office: (804) 786-4150. The results will let you know what, if any, amendments you'll need to add. I think the choice of a tall fescue is fine and fall is a good time to start a cool-season grass. When purchasing seed, check the bag to make sure you are buying all seed and no filler. Look for the two Virginia-Maryland labels affixed to the package so you know you are buying seed mixtures or blends which comply with the quality standards of the Extension Divisions of Virginia Tech and U of MD. First, you'll need to prep the soil. Remove all the dead weeds you've killed by covering and make sure there are no roots left in the ground. This can be tedious but it will pay off in the long run. Work in any amendments your soil test dictates. Add a layer of compost, you can till it in, or if your soil isn't compacted, adding 1-2 inches to the surface should suffice. Grade the soil with a rake so the surface is smooth and uniform. At this point you can seed. Disburse the seed with a spreader and go back and forth across the lawn, then in a perpendicular direction, attempting to get an even amount of seed across the surface of the lawn. You can add another fine layer of compost so that there is good contact between the seed and soil. (For a larger lawn you would roll the seed at this point.) Then you'll need to water immediately thereafter and continue to water until the seed germinates. (Be careful when watering, keep the soil moist, don't wash the seed away.) After that a total of 1-2 inches of water a week should keep the grass in good spirits. Hand pull weeds. An established lawn could take up to 2 years with seed. If this doesn't sound like fun, you can clean up the soil as above, amend as needed, grade it with a rake, and lay sod. Do not let the sod dry out. You'll need to water the sod daily for a couple of weeks (of course, less if there's rain). During this period the sod will be putting down shallow roots into your soil bed. Avoid walking on the sod during this period. After about a month the sod will have established a better root system. Around this time it will need to be mowed. Set the mower to 3 inches. The sod will provide a quicker route to a nice green lawn if the expense is acceptable. I hope I've covered all your options. Good luck with the project!

Watering roses

    Date Posted: Wed, Aug 18 - 1:48 pm

    Question

  • Hi i have a row of drift roses on the front on my yard, they are in full sun. I had been watering them every other day with the lawn but noticed that a few bushes had yellowing leaves which then turned brown and crispy. I am assuming that is a sign of being overwatered? Any suggestions on how to make the flowers last so they don’t turn brown so quickly in the heat? Thanks!
  • Answer

  • Hello there, My first instinct is that you are, in fact, over watering your roses. How long have the roses been planted? If it's been a few years then watering once or twice a week should be sufficient. Is the soil well draining? Roses don't want to sit in consistently wet soil. Are you able to gauge how much water, in inches, your roses are receiving. one to 2 inches of water (rain+water combined) should keep them healthy. I believe that's about 4-5 gallons of water a week. Also, I don't think the heat is causing the roses to brown but the effects of over watering are. Back off on the watering a bit. Try to avoid the foliage and water the soil around the plants and see that they get soaked rather than sprinkled. I suspect that less water weekly (avoiding the foliage whenever possible) and a couple of good soaks a week will make you and your roses happier. Good luck!

Yellowing Aster

    Date Posted: Wed, Aug 18 - 1:46 pm

    Question

  • Hi we have a row of fall aster and notice that this year and last as the rest of the plant grows large and bushy the base starts to get yellow and then dries. the plant seems to be getting enough water. Is this normal?
  • Answer

  • Good morning, and thank you for your question! My first thought is that you may have a watering issue. I’m assuming your aster plants otherwise have normal growth, are not stunted, and bloom well. Asters do prefer well-draining soil and like to keep well watered. However, they do not like overhead watering or sprinkling. Doing so can result in development of a fungal disease. Watering should be done at the base of the plant where fungus would first develop. It also helps to use a good organic mulch around your aster plants to help retain moisture and prevent splash to the lower leaves which can cause the yellowing. As a side note, be on the lookout for leafhoppers on your aster. They can spread bacterial disease (phytoplasma), which is a more serious problem to deal with, but with this you would likely notice other symptoms such as stunted growth and deformed flowers as well. If those symptoms develop, the plants would need to be removed as there is no cure. It does not sound like you are experiencing these specific problems with your aster, and proper watering and mulching would be the best first steps to implement. Good luck with this, and let us know if further symptoms develop.

Majesty Palm dying

    Date Posted: Tue, Aug 17 - 8:40 pm

    Question

  • I have a majesty palm that sits in a corner by my living room windows. It doesn't get very much light there (but I don't have anywhere else to put it) so I added a growth light. The light delivers red and blue light for 4/hrs every night and is set up about 5 feet away. I also have a terracotta automatic water in the soil, which keeps the soil most without being soggy. Nonetheless, the plant is dying. The fronds have been turning brown from the outside in and now I've had to cut away two complete fronds which and a third is on the verge of death. What am I doing wrong and is there anything I can do to still save it?
  • Answer

  • Majesty palms are very particular about the level of light required, but it sounds like you are dealing with that effectively with the grow light. One factor you did not mention was your soil. These plants require very well aerated, loose soil which drains well. Make sure your soil is not too dense, particularly since you are irrigating with terra-cotta automatic watering. I have three majesty palms and all are sitting in north facing windows. They are getting only indirect light all day. One of them was initially in densely packed soil, and was not doing well, so I repotted in a very loose soil and the palm seems much happier. Also, these plants love to be fed. I use a miracle-gro continuous release palm plant food, so you may want to try that.

Tomato-Blossom End Rot

    Date Posted: Tue, Aug 17 - 8:37 pm

    Question

  • I'm just starting to see fruit on my tomato vines, but unfortunately they look to already be developing blossom end rot. I'm using a mixture of organic soil with fertilizer and perlite, and I'm not sure if the plant is salvageable. What can I do to help this plant? And what advice can you give for other tomato plants to prevent this blossom end rot? Is there something I can apply early on to prevent this? Thanks!
  • Answer

  • Hello there, This is a pretty standard issue with tomatoes. Generally, the cause is inconsistent watering and/or a calcium deficiency. So the first step would be to establish a consistent level of watering for your plants. Of course, Mother Nature plays a role here as well, you can't control that. If you're sure that watering is not the problem, then you need to think about calcium. Without testing the soil you won't know the level of deficiency. But if you want to proceed, there is a short-term fix. I haven't tried this myself because the cause for me was generally a watering issue, but you can spray the plant with a calcium solution. That will buy you some time to increase the calcium content in your soil. There may be enough calcium in the soil but the ph of the soil may be preventing the plant from absorbing it. I don't understand all the chemistry of this but soil ph is the root of plant happiness. A ph of around 6.5 will do. Try adding some fast-acting lime (don't use dolomitic lime) and working that into the soil about 12 inches deep.The lime frees up the calcium from the soil. As I said previously about chemistry....This is a time-honored practice so it should work for you if, in fact, you find that watering is not the problem. If you would like to have a soil profile done, please let us know and we can send you a soil test request kit. Good luck with the tomato harvest!

Gardening in Raised Bed

    Date Posted: Mon, Jul 05 - 6:29 pm

    Question

  • I bought a cedar raised bed kit from Lowes that stands on legs off the ground. I bought bags of organic raised bed soil as the kids suggested. I planted lettuce in it and it only made seedlings. So I put the tomato plants in it but they didn't grow either. I watered every day and it was in direct sun. Why would this be happening?
  • Answer

  • Good afternoon! Thank you for your question. I know from experience that it is frustrating when you put time and effort into planting new plants, only to have them not thrive. Gardening is certainly a learning experience! From the information you provided, I am assuming you planted the lettuce and then the tomatoes in recent weeks. The first thing that comes to mind as far as the lettuce goes is that lettuce is a cool season vegetable, best planted in very early spring (March) for harvest in late spring or early summer. I'm wondering if you planted your lettuce from seed in late spring and by the time germination occurred the weather was already getting too warm. If lettuce is planted in late spring, it will certainly need some shade as summer approaches. Your best bet is to try planting your lettuce again in the fall season. And as you did before, water frequently and keep it in a sunny location during the cool fall season. With the tomatoes, it sounds like you planted them at the appropriate time, and in a sunny location which they require. My only thought here is that the tomatoes may have been watered too frequently, and the soil did not have a chance to dry out enough before a subsequent watering. Overwatering tomato plants can cause the leaves to turn yellow if the roots are not getting enough oxygen from overly saturated soil that does not have a chance to dry out. You may also want to check the drainage in your raised bed. Does it have a liner? This could be a factor in water retention in your bed if you are perhaps watering too frequently and proper drainage is not occurring. The best rule of thumb to check soil moisture is to insert a trowel, or wooden dowel, about 6 inches into the soil, and check to see if it comes out clean (soil has dried out), or if it comes out with damp soil clinging to the trowel or dowel. If it comes out with damp soil clinging, you do not need to water. Overwatering is a common mistake in gardening, and growing plants in pots or raised beds makes it even trickier. But with the right practices in routinely checking your soil moisture several inches down into the soil (before watering), you should have better success. If you have other questions, or experienced other circumstances than what I assumed above, feel free to reach back out to us and we'll be happy to help!